add holder and replace placehold.it

15 files changed, 360 insertions, 86 deletions

diff --git a/docs/assets/js/bootstrap.min.js b/docs/assets/js/bootstrap.min.js
index 502b1d6c8..9ff72eb77 100644
--- a/docs/assets/js/bootstrap.min.js
+++ b/docs/assets/js/bootstrap.min.js
@@ -3,4 +3,21 @@
 * Copyright 2012 Twitter, Inc.
 * http://www.apache.org/licenses/LICENSE-2.0.txt
 */
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\ No newline at end of file
+/* ===================================================
+ * bootstrap-transition.js v2.2.2
+ * http://twitter.github.com/bootstrap/javascript.html#transitions
+ * ===================================================
+ * Copyright 2012 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================== */!function(e){"use strict";e(function(){e.support.transition=function(){var e=function(){var e=document.createElement("bootstrap"),t={WebkitTransition:"webkitTransitionEnd",MozTransition:"transitionend",OTransition:"oTransitionEnd otransitionend",transition:"transitionend"},n;for(n in t)if(e.style[n]!==undefined)return t[n]}();return e&&{end:e}}()})}(window.jQuery),!function(e){"use strict";var t='[data-dismiss="alert"]',n=function(n){e(n).on("click",t,this.close)};n.prototype.close=function(t){function s(){i.trigger("closed").remove()}var n=e(this),r=n.attr("data-target"),i;r||(r=n.attr("href"),r=r&&r.replace(/.*(?=#[^\s]*$)/,"")),i=e(r),t&&t.preventDefault(),i.length||(i=n.hasClass("alert")?n:n.parent()),i.trigger(t=e.Event("close"));if(t.isDefaultPrevented())return;i.removeClass("in"),e.support.transition&&i.hasClass("fade")?i.on(e.support.transition.end,s):s()},e.fn.alert=function(t){return this.each(function(){var 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this.getTitle()},getPosition:function(t){return e.extend({},t?{top:0,left:0}:this.$element.offset(),{width:this.$element[0].offsetWidth,height:this.$element[0].offsetHeight})},getTitle:function(){var e,t=this.$element,n=this.options;return e=t.attr("data-original-title")||(typeof n.title=="function"?n.title.call(t[0]):n.title),e},tip:function(){return this.$tip=this.$tip||e(this.options.template)},validate:function(){this.$element[0].parentNode||(this.hide(),this.$element=null,this.options=null)},enable:function(){this.enabled=!0},disable:function(){this.enabled=!1},toggleEnabled:function(){this.enabled=!this.enabled},toggle:function(t){var n=e(t.currentTarget)[this.type](this._options).data(this.type);n[n.tip().hasClass("in")?"hide":"show"]()},destroy:function(){this.hide().$element.off("."+this.type).removeData(this.type)}},e.fn.tooltip=function(n){return this.each(function(){var r=e(this),i=r.data("tooltip"),s=typeof n=="object"&&n;i||r.data("tooltip",i=new t(this,s)),typeof 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n,r;this.activeTarget=t,e(this.selector).parent(".active").removeClass("active"),r=this.selector+'[data-target="'+t+'"],'+this.selector+'[href="'+t+'"]',n=e(r).parent("li").addClass("active"),n.parent(".dropdown-menu").length&&(n=n.closest("li.dropdown").addClass("active")),n.trigger("activate")}},e.fn.scrollspy=function(n){return this.each(function(){var r=e(this),i=r.data("scrollspy"),s=typeof n=="object"&&n;i||r.data("scrollspy",i=new t(this,s)),typeof n=="string"&&i[n]()})},e.fn.scrollspy.Constructor=t,e.fn.scrollspy.defaults={offset:10},e(window).on("load",function(){e('[data-spy="scroll"]').each(function(){var t=e(this);t.scrollspy(t.data())})})}(window.jQuery),!function(e){"use strict";var t=function(t){this.element=e(t)};t.prototype={constructor:t,show:function(){var t=this.element,n=t.closest("ul:not(.dropdown-menu)"),r=t.attr("data-target"),i,s,o;r||(r=t.attr("href"),r=r&&r.replace(/.*(?=#[^\s]*$)/,""));if(t.parent("li").hasClass("active"))return;i=n.find(".active:last 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\ No newline at end of file
diff --git a/docs/assets/js/holder/holder.js b/docs/assets/js/holder/holder.js
new file mode 100755
index 000000000..6460c74dd
--- /dev/null
+++ b/docs/assets/js/holder/holder.js
@@ -0,0 +1,230 @@
+/*
+
+Holder - 1.4 - client side image placeholders
+(c) 2012 Ivan Malopinsky / http://imsky.co
+
+Provided under the Apache 2.0 License: http://www.apache.org/licenses/LICENSE-2.0
+Commercial use requires attribution.
+
+*/
+
+var Holder = Holder || {};
+(function (app, win) {
+
+var preempted = false,
+fallback = false,
+canvas = document.createElement('canvas');
+
+//getElementsByClassName polyfill
+document.getElementsByClassName||(document.getElementsByClassName=function(e){var t=document,n,r,i,s=[];if(t.querySelectorAll)return t.querySelectorAll("."+e);if(t.evaluate){r=".//*[contains(concat(' ', @class, ' '), ' "+e+" ')]",n=t.evaluate(r,t,null,0,null);while(i=n.iterateNext())s.push(i)}else{n=t.getElementsByTagName("*"),r=new RegExp("(^|\\s)"+e+"(\\s|$)");for(i=0;i<n.length;i++)r.test(n[i].className)&&s.push(n[i])}return s})
+
+//getComputedStyle polyfill
+window.getComputedStyle||(window.getComputedStyle=function(e,t){return this.el=e,this.getPropertyValue=function(t){var n=/(\-([a-z]){1})/g;return t=="float"&&(t="styleFloat"),n.test(t)&&(t=t.replace(n,function(){return arguments[2].toUpperCase()})),e.currentStyle[t]?e.currentStyle[t]:null},this})
+
+//http://javascript.nwbox.com/ContentLoaded by Diego Perini with modifications
+function contentLoaded(n,t){var l="complete",s="readystatechange",u=!1,h=u,c=!0,i=n.document,a=i.documentElement,e=i.addEventListener?"addEventListener":"attachEvent",v=i.addEventListener?"removeEventListener":"detachEvent",f=i.addEventListener?"":"on",r=function(e){(e.type!=s||i.readyState==l)&&((e.type=="load"?n:i)[v](f+e.type,r,u),!h&&(h=!0)&&t.call(n,null))},o=function(){try{a.doScroll("left")}catch(n){setTimeout(o,50);return}r("poll")};if(i.readyState==l)t.call(n,"lazy");else{if(i.createEventObject&&a.doScroll){try{c=!n.frameElement}catch(y){}c&&o()}i[e](f+"DOMContentLoaded",r,u),i[e](f+s,r,u),n[e](f+"load",r,u)}};
+
+//https://gist.github.com/991057 by Jed Schmidt with modifications
+function selector(a){
+	a=a.match(/^(\W)?(.*)/);var b=document["getElement"+(a[1]?a[1]=="#"?"ById":"sByClassName":"sByTagName")](a[2]);
+	var ret=[];	b!=null&&(b.length?ret=b:b.length==0?ret=b:ret=[b]);	return ret;
+}
+
+//shallow object property extend
+function extend(a,b){var c={};for(var d in a)c[d]=a[d];for(var e in b)c[e]=b[e];return c}
+
+function draw(ctx, dimensions, template) {
+	var dimension_arr = [dimensions.height, dimensions.width].sort();
+	var maxFactor = Math.round(dimension_arr[1] / 16),
+		minFactor = Math.round(dimension_arr[0] / 16);
+	var text_height = Math.max(template.size, maxFactor);
+	canvas.width = dimensions.width;
+	canvas.height = dimensions.height;
+	ctx.textAlign = "center";
+	ctx.textBaseline = "middle";
+	ctx.fillStyle = template.background;
+	ctx.fillRect(0, 0, dimensions.width, dimensions.height);
+	ctx.fillStyle = template.foreground;
+	ctx.font = "bold " + text_height + "px sans-serif";
+	var text = template.text ? template.text : (dimensions.width + "x" + dimensions.height);
+	if (Math.round(ctx.measureText(text).width) / dimensions.width > 1) {
+		text_height = Math.max(minFactor, template.size);
+	}
+	ctx.font = "bold " + text_height + "px sans-serif";
+	ctx.fillText(text, (dimensions.width / 2), (dimensions.height / 2), dimensions.width);
+	return canvas.toDataURL("image/png");
+}
+
+if (!canvas.getContext) {
+	fallback = true;
+} else {
+	if (canvas.toDataURL("image/png").indexOf("data:image/png") < 0) {
+		//Android doesn't support data URI
+		fallback = true;
+	} else {
+		var ctx = canvas.getContext("2d");
+	}
+}
+
+function render(mode, el, holder, src){
+
+	var dimensions = holder.dimensions, theme = holder.theme, text = holder.text;
+	var dimensions_caption = dimensions.width + "x" + dimensions.height;
+		theme = (text ? extend(theme, {	text: text	}) : theme);
+
+	if(mode == "image"){
+		el.setAttribute("data-src", src);
+		el.setAttribute("alt", text ? text : theme.text ? theme.text + " [" + dimensions_caption + "]" : dimensions_caption);
+		el.style.width = dimensions.width + "px";
+		el.style.height = dimensions.height + "px";
+		el.style.backgroundColor = theme.background;
+
+		if(!fallback){
+			el.setAttribute("src", draw(ctx, dimensions, theme));
+		}
+	}
+	else {
+		if(!fallback){
+			el.style.backgroundImage = "url("+draw(ctx, dimensions, theme)+")";
+		}
+	}
+
+};
+
+function parse_flags(flags, options){
+
+	var ret = {
+		theme: settings.themes.gray
+		}, render = false;
+
+	for (sl = flags.length, j = 0; j < sl; j++) {
+				if (app.flags.dimensions.match(flags[j])) {
+					render = true;
+					ret.dimensions = app.flags.dimensions.output(flags[j]);
+				} else if (app.flags.colors.match(flags[j])) {
+					ret.theme = app.flags.colors.output(flags[j]);
+				} else if (options.themes[flags[j]]) {
+					//If a theme is specified, it will override custom colors
+					ret.theme = options.themes[flags[j]];
+				} else if (app.flags.text.match(flags[j])) {
+					ret.text = app.flags.text.output(flags[j]);
+				}
+	}
+
+	return render ? ret : false;
+
+};
+
+var settings = {
+	domain: "holder.js",
+	images: "img",
+	elements: ".holderjs",
+	themes: {
+		"gray": {
+			background: "#eee",
+			foreground: "#aaa",
+			size: 12
+		},
+		"social": {
+			background: "#3a5a97",
+			foreground: "#fff",
+			size: 12
+		},
+		"industrial": {
+			background: "#434A52",
+			foreground: "#C2F200",
+			size: 12
+		}
+	}
+};
+
+
+app.flags = {
+	dimensions: {
+		regex: /([0-9]+)x([0-9]+)/,
+		output: function(val){
+			var exec = this.regex.exec(val);
+			return {
+				width: +exec[1],
+				height: +exec[2]
+			}
+		}
+	},
+	colors: {
+		regex: /#([0-9a-f]{3,})\:#([0-9a-f]{3,})/i,
+		output: function(val){
+			var exec = this.regex.exec(val);
+			return {
+					size: settings.themes.gray.size,
+					foreground: "#" + exec[2],
+					background: "#" + exec[1]
+					}
+		}
+	},
+	text: {
+		regex: /text\:(.*)/,
+		output: function(val){
+			return this.regex.exec(val)[1];
+		}
+	}
+}
+
+for(var flag in app.flags){
+	app.flags[flag].match = function (val){
+		return val.match(this.regex)
+	}
+}
+
+app.add_theme = function (name, theme) {
+	name != null && theme != null && (settings.themes[name] = theme);
+	return app;
+};
+
+app.add_image = function (src, el) {
+	var node = selector(el);
+	if (node.length) {
+		for (var i = 0, l = node.length; i < l; i++) {
+			var img = document.createElement("img")
+			img.setAttribute("data-src", src);
+			node[i].appendChild(img);
+		}
+	}
+	return app;
+};
+
+app.run = function (o) {
+	var options = extend(settings, o),
+		images = selector(options.images),
+		elements = selector(options.elements),
+		preempted = true;
+
+	var cssregex = new RegExp(options.domain+"\/(.*?)\"?\\)");
+
+	for(var l = elements.length, i = 0; i < l; i++){
+		var src = window.getComputedStyle(elements[i],null).getPropertyValue("background-image");
+		var flags = src.match(cssregex);
+		if(flags){
+			var holder = parse_flags(flags[1].split("/"), options);
+			if(holder){
+				render("background", elements[i], holder, src);
+			}
+		}
+	}
+
+	for (var l = images.length, i = 0; i < l; i++) {
+		var src = images[i].getAttribute("data-src") || images[i].getAttribute("src");
+		if (src.indexOf(options.domain)>=0) {
+			var holder = parse_flags(src.substr(src.lastIndexOf(options.domain) + options.domain.length + 1).split("/"), options);
+			if (holder) {
+				render("image", images[i], holder, src);
+			}
+		}
+	}
+	return app;
+};
+
+contentLoaded(win, function () {
+	preempted || app.run()
+});
+
+})(Holder, window);
diff --git a/docs/base-css.html b/docs/base-css.html
index 69229231f..651912f3a 100644
--- a/docs/base-css.html
+++ b/docs/base-css.html
@@ -1825,9 +1825,9 @@ For example, &lt;code&gt;&lt;section&gt;&lt;/code&gt; should be wrapped as inlin
 
           <p>Add classes to an <code>&lt;img&gt;</code> element to easily style images in any project.</p>
           <div class="bs-docs-example bs-docs-example-images">
-            <img src="http://placehold.it/140x140" class="img-rounded">
-            <img src="http://placehold.it/140x140" class="img-circle">
-            <img src="http://placehold.it/140x140" class="img-polaroid">
+            <img data-src="holder.js/140x140" class="img-rounded">
+            <img data-src="holder.js/140x140" class="img-circle">
+            <img data-src="holder.js/140x140" class="img-polaroid">
           </div>
 <pre class="prettyprint linenums">
 &lt;img src="..." class="img-rounded"&gt;
@@ -2173,7 +2173,6 @@ For example, &lt;code&gt;&lt;section&gt;&lt;/code&gt; should be wrapped as inlin
     <!-- Placed at the end of the document so the pages load faster -->
     <script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>
     <script src="assets/js/jquery.js"></script>
-    <script src="assets/js/google-code-prettify/prettify.js"></script>
     <script src="assets/js/bootstrap-transition.js"></script>
     <script src="assets/js/bootstrap-alert.js"></script>
     <script src="assets/js/bootstrap-modal.js"></script>
@@ -2187,6 +2186,10 @@ For example, &lt;code&gt;&lt;section&gt;&lt;/code&gt; should be wrapped as inlin
     <script src="assets/js/bootstrap-carousel.js"></script>
     <script src="assets/js/bootstrap-typeahead.js"></script>
     <script src="assets/js/bootstrap-affix.js"></script>
+
+    <script src="assets/js/holder/holder.js"></script>
+    <script src="assets/js/google-code-prettify/prettify.js"></script>
+
     <script src="assets/js/application.js"></script>
 
 
diff --git a/docs/components.html b/docs/components.html
index 5cda4f168..a5b1b6afa 100644
--- a/docs/components.html
+++ b/docs/components.html
@@ -1924,22 +1924,22 @@
             <ul class="thumbnails">
               <li class="span3">
                 <a href="#" class="thumbnail">
-                  <img src="http://placehold.it/260x180" alt="">
+                  <img data-src="holder.js/260x180" alt="">
                 </a>
               </li>
               <li class="span3">
                 <a href="#" class="thumbnail">
-                  <img src="http://placehold.it/260x180" alt="">
+                  <img data-src="holder.js/260x180" alt="">
                 </a>
               </li>
               <li class="span3">
                 <a href="#" class="thumbnail">
-                  <img src="http://placehold.it/260x180" alt="">
+                  <img data-src="holder.js/260x180" alt="">
                 </a>
               </li>
               <li class="span3">
                 <a href="#" class="thumbnail">
-                  <img src="http://placehold.it/260x180" alt="">
+                  <img data-src="holder.js/260x180" alt="">
                 </a>
               </li>
             </ul>
@@ -1951,7 +1951,7 @@
             <ul class="thumbnails">
               <li class="span4">
                 <div class="thumbnail">
-                  <img src="http://placehold.it/300x200" alt="">
+                  <img data-src="holder.js/300x200" alt="">
                   <div class="caption">
                     <h3>Thumbnail label</h3>
                     <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
@@ -1961,7 +1961,7 @@
               </li>
               <li class="span4">
                 <div class="thumbnail">
-                  <img src="http://placehold.it/300x200" alt="">
+                  <img data-src="holder.js/300x200" alt="">
                   <div class="caption">
                     <h3>Thumbnail label</h3>
                     <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
@@ -1971,7 +1971,7 @@
               </li>
               <li class="span4">
                 <div class="thumbnail">
-                  <img src="http://placehold.it/300x200" alt="">
+                  <img data-src="holder.js/300x200" alt="">
                   <div class="caption">
                     <h3>Thumbnail label</h3>
                     <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
@@ -1997,7 +1997,7 @@
 &lt;ul class="thumbnails"&gt;
   &lt;li class="span4"&gt;
     &lt;a href="#" class="thumbnail"&gt;
-      &lt;img src="http://placehold.it/300x200" alt=""&gt;
+      &lt;img data-src="holder.js/300x200" alt=""&gt;
     &lt;/a&gt;
   &lt;/li&gt;
   ...
@@ -2008,7 +2008,7 @@
 &lt;ul class="thumbnails"&gt;
   &lt;li class="span4"&gt;
     &lt;div class="thumbnail"&gt;
-      &lt;img src="http://placehold.it/300x200" alt=""&gt;
+      &lt;img data-src="holder.js/300x200" alt=""&gt;
       &lt;h3&gt;Thumbnail label&lt;/h3&gt;
       &lt;p&gt;Thumbnail caption...&lt;/p&gt;
     &lt;/div&gt;
@@ -2022,27 +2022,27 @@
           <ul class="thumbnails">
             <li class="span4">
               <a href="#" class="thumbnail">
-                <img src="http://placehold.it/360x270" alt="">
+                <img data-src="holder.js/360x270" alt="">
               </a>
             </li>
             <li class="span3">
               <a href="#" class="thumbnail">
-                <img src="http://placehold.it/260x120" alt="">
+                <img data-src="holder.js/260x120" alt="">
               </a>
             </li>
             <li class="span2">
               <a href="#" class="thumbnail">
-                <img src="http://placehold.it/160x120" alt="">
+                <img data-src="holder.js/160x120" alt="">
               </a>
             </li>
             <li class="span3">
               <a href="#" class="thumbnail">
-                <img src="http://placehold.it/260x120" alt="">
+                <img data-src="holder.js/260x120" alt="">
               </a>
             </li>
             <li class="span2">
               <a href="#" class="thumbnail">
-                <img src="http://placehold.it/160x120" alt="">
+                <img data-src="holder.js/160x120" alt="">
               </a>
             </li>
           </ul>
@@ -2314,7 +2314,7 @@
           <div class="bs-docs-example">
             <div class="media">
               <a class="pull-left" href="#">
-                <img class="media-object" src="http://placehold.it/64x64">
+                <img class="media-object" data-src="holder.js/64x64">
               </a>
               <div class="media-body">
                 <h4 class="media-heading">Media heading</h4>
@@ -2323,14 +2323,14 @@
             </div>
             <div class="media">
               <a class="pull-left" href="#">
-                <img class="media-object" src="http://placehold.it/64x64">
+                <img class="media-object" data-src="holder.js/64x64">
               </a>
               <div class="media-body">
                 <h4 class="media-heading">Media heading</h4>
                 Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
                 <div class="media">
                   <a class="pull-left" href="#">
-                    <img class="media-object" src="http://placehold.it/64x64">
+                    <img class="media-object" data-src="holder.js/64x64">
                   </a>
                   <div class="media-body">
                     <h4 class="media-heading">Media heading</h4>
@@ -2343,7 +2343,7 @@
 <pre class="prettyprint linenums">
 &lt;div class="media"&gt;
   &lt;a class="pull-left" href="#"&gt;
-    &lt;img class="media-object" src="http://placehold.it/64x64"&gt;
+    &lt;img class="media-object" data-src="holder.js/64x64"&gt;
   &lt;/a&gt;
   &lt;div class="media-body"&gt;
     &lt;h4 class="media-heading"&gt;Media heading&lt;/h4&gt;
@@ -2367,7 +2367,7 @@
             <ul class="media-list">
               <li class="media">
                 <a class="pull-left" href="#">
-                  <img class="media-object" src="http://placehold.it/64x64">
+                  <img class="media-object" data-src="holder.js/64x64">
                 </a>
                 <div class="media-body">
                   <h4 class="media-heading">Media heading</h4>
@@ -2375,7 +2375,7 @@
                   <!-- Nested media object -->
                   <div class="media">
                     <a class="pull-left" href="#">
-                      <img class="media-object" src="http://placehold.it/64x64">
+                      <img class="media-object" data-src="holder.js/64x64">
                     </a>
                     <div class="media-body">
                       <h4 class="media-heading">Nested media heading</h4>
@@ -2383,7 +2383,7 @@
                       <!-- Nested media object -->
                       <div class="media">
                         <a class="pull-left" href="#">
-                          <img class="media-object" src="http://placehold.it/64x64">
+                          <img class="media-object" data-src="holder.js/64x64">
                         </a>
                         <div class="media-body">
                           <h4 class="media-heading">Nested media heading</h4>
@@ -2395,7 +2395,7 @@
                   <!-- Nested media object -->
                   <div class="media">
                     <a class="pull-left" href="#">
-                      <img class="media-object" src="http://placehold.it/64x64">
+                      <img class="media-object" data-src="holder.js/64x64">
                     </a>
                     <div class="media-body">
                       <h4 class="media-heading">Nested media heading</h4>
@@ -2406,7 +2406,7 @@
               </li>
               <li class="media">
                 <a class="pull-right" href="#">
-                  <img class="media-object" src="http://placehold.it/64x64">
+                  <img class="media-object" data-src="holder.js/64x64">
                 </a>
                 <div class="media-body">
                   <h4 class="media-heading">Media heading</h4>
@@ -2419,7 +2419,7 @@
 &lt;ul class="media-list"&gt;
   &lt;li class="media"&gt;
     &lt;a class="pull-left" href="#"&gt;
-      &lt;img class="media-object" src="http://placehold.it/64x64"&gt;
+      &lt;img class="media-object" data-src="holder.js/64x64"&gt;
     &lt;/a&gt;
     &lt;div class="media-body"&gt;
       &lt;h4 class="media-heading"&gt;Media heading&lt;/h4&gt;
@@ -2581,7 +2581,6 @@ class="clearfix"
     <!-- Placed at the end of the document so the pages load faster -->
     <script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>
     <script src="assets/js/jquery.js"></script>
-    <script src="assets/js/google-code-prettify/prettify.js"></script>
     <script src="assets/js/bootstrap-transition.js"></script>
     <script src="assets/js/bootstrap-alert.js"></script>
     <script src="assets/js/bootstrap-modal.js"></script>
@@ -2595,6 +2594,10 @@ class="clearfix"
     <script src="assets/js/bootstrap-carousel.js"></script>
     <script src="assets/js/bootstrap-typeahead.js"></script>
     <script src="assets/js/bootstrap-affix.js"></script>
+
+    <script src="assets/js/holder/holder.js"></script>
+    <script src="assets/js/google-code-prettify/prettify.js"></script>
+
     <script src="assets/js/application.js"></script>
 
 
diff --git a/docs/customize.html b/docs/customize.html
index b2eddc592..9d9d3c26b 100644
--- a/docs/customize.html
+++ b/docs/customize.html
@@ -489,7 +489,6 @@
     <!-- Placed at the end of the document so the pages load faster -->
     <script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>
     <script src="assets/js/jquery.js"></script>
-    <script src="assets/js/google-code-prettify/prettify.js"></script>
     <script src="assets/js/bootstrap-transition.js"></script>
     <script src="assets/js/bootstrap-alert.js"></script>
     <script src="assets/js/bootstrap-modal.js"></script>
@@ -503,6 +502,10 @@
     <script src="assets/js/bootstrap-carousel.js"></script>
     <script src="assets/js/bootstrap-typeahead.js"></script>
     <script src="assets/js/bootstrap-affix.js"></script>
+
+    <script src="assets/js/holder/holder.js"></script>
+    <script src="assets/js/google-code-prettify/prettify.js"></script>
+
     <script src="assets/js/application.js"></script>
 
 
diff --git a/docs/examples/carousel.html b/docs/examples/carousel.html
index 92134c506..42b95dd7e 100644
--- a/docs/examples/carousel.html
+++ b/docs/examples/carousel.html
@@ -353,19 +353,19 @@
       <!-- Three columns of text below the carousel -->
       <div class="row">
         <div class="span4">
-          <img class="img-circle" src="http://placehold.it/140x140">
+          <img class="img-circle" data-src="holder.js/140x140">
           <h2>Heading</h2>
           <p>Donec sed odio dui. Etiam porta sem malesuada magna mollis euismod. Nullam id dolor id nibh ultricies vehicula ut id elit. Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.</p>
           <p><a class="btn" href="#">View details &raquo;</a></p>
         </div><!-- /.span4 -->
         <div class="span4">
-          <img class="img-circle" src="http://placehold.it/140x140">
+          <img class="img-circle" data-src="holder.js/140x140">
           <h2>Heading</h2>
           <p>Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Cras mattis consectetur purus sit amet fermentum. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.</p>
           <p><a class="btn" href="#">View details &raquo;</a></p>
         </div><!-- /.span4 -->
         <div class="span4">
-          <img class="img-circle" src="http://placehold.it/140x140">
+          <img class="img-circle" data-src="holder.js/140x140">
           <h2>Heading</h2>
           <p>Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.</p>
           <p><a class="btn" href="#">View details &raquo;</a></p>
diff --git a/docs/extend.html b/docs/extend.html
index 31c0def84..938f064f4 100644
--- a/docs/extend.html
+++ b/docs/extend.html
@@ -265,7 +265,6 @@
     <!-- Placed at the end of the document so the pages load faster -->
     <script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>
     <script src="assets/js/jquery.js"></script>
-    <script src="assets/js/google-code-prettify/prettify.js"></script>
     <script src="assets/js/bootstrap-transition.js"></script>
     <script src="assets/js/bootstrap-alert.js"></script>
     <script src="assets/js/bootstrap-modal.js"></script>
@@ -279,6 +278,10 @@
     <script src="assets/js/bootstrap-carousel.js"></script>
     <script src="assets/js/bootstrap-typeahead.js"></script>
     <script src="assets/js/bootstrap-affix.js"></script>
+
+    <script src="assets/js/holder/holder.js"></script>
+    <script src="assets/js/google-code-prettify/prettify.js"></script>
+
     <script src="assets/js/application.js"></script>
 
 
diff --git a/docs/getting-started.html b/docs/getting-started.html
index 17c11e5f1..4f910e2dc 100644
--- a/docs/getting-started.html
+++ b/docs/getting-started.html
@@ -343,7 +343,6 @@
     <!-- Placed at the end of the document so the pages load faster -->
     <script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>
     <script src="assets/js/jquery.js"></script>
-    <script src="assets/js/google-code-prettify/prettify.js"></script>
     <script src="assets/js/bootstrap-transition.js"></script>
     <script src="assets/js/bootstrap-alert.js"></script>
     <script src="assets/js/bootstrap-modal.js"></script>
@@ -357,6 +356,10 @@
     <script src="assets/js/bootstrap-carousel.js"></script>
     <script src="assets/js/bootstrap-typeahead.js"></script>
     <script src="assets/js/bootstrap-affix.js"></script>
+
+    <script src="assets/js/holder/holder.js"></script>
+    <script src="assets/js/google-code-prettify/prettify.js"></script>
+
     <script src="assets/js/application.js"></script>
 
 
diff --git a/docs/index.html b/docs/index.html
index ec2606085..12521d065 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -196,7 +196,6 @@
     <!-- Placed at the end of the document so the pages load faster -->
     <script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>
     <script src="assets/js/jquery.js"></script>
-    <script src="assets/js/google-code-prettify/prettify.js"></script>
     <script src="assets/js/bootstrap-transition.js"></script>
     <script src="assets/js/bootstrap-alert.js"></script>
     <script src="assets/js/bootstrap-modal.js"></script>
@@ -210,6 +209,10 @@
     <script src="assets/js/bootstrap-carousel.js"></script>
     <script src="assets/js/bootstrap-typeahead.js"></script>
     <script src="assets/js/bootstrap-affix.js"></script>
+
+    <script src="assets/js/holder/holder.js"></script>
+    <script src="assets/js/google-code-prettify/prettify.js"></script>
+
     <script src="assets/js/application.js"></script>
 
 
diff --git a/docs/javascript.html b/docs/javascript.html
index f07f28909..9a834b820 100644
--- a/docs/javascript.html
+++ b/docs/javascript.html
@@ -1726,7 +1726,6 @@ $('[data-spy="affix"]').each(function () {
     <!-- Placed at the end of the document so the pages load faster -->
     <script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>
     <script src="assets/js/jquery.js"></script>
-    <script src="assets/js/google-code-prettify/prettify.js"></script>
     <script src="assets/js/bootstrap-transition.js"></script>
     <script src="assets/js/bootstrap-alert.js"></script>
     <script src="assets/js/bootstrap-modal.js"></script>
@@ -1740,6 +1739,10 @@ $('[data-spy="affix"]').each(function () {
     <script src="assets/js/bootstrap-carousel.js"></script>
     <script src="assets/js/bootstrap-typeahead.js"></script>
     <script src="assets/js/bootstrap-affix.js"></script>
+
+    <script src="assets/js/holder/holder.js"></script>
+    <script src="assets/js/google-code-prettify/prettify.js"></script>
+
     <script src="assets/js/application.js"></script>
 
 
diff --git a/docs/scaffolding.html b/docs/scaffolding.html
index 31f2f986a..4b13e2842 100644
--- a/docs/scaffolding.html
+++ b/docs/scaffolding.html
@@ -577,7 +577,6 @@
     <!-- Placed at the end of the document so the pages load faster -->
     <script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>
     <script src="assets/js/jquery.js"></script>
-    <script src="assets/js/google-code-prettify/prettify.js"></script>
     <script src="assets/js/bootstrap-transition.js"></script>
     <script src="assets/js/bootstrap-alert.js"></script>
     <script src="assets/js/bootstrap-modal.js"></script>
@@ -591,6 +590,10 @@
     <script src="assets/js/bootstrap-carousel.js"></script>
     <script src="assets/js/bootstrap-typeahead.js"></script>
     <script src="assets/js/bootstrap-affix.js"></script>
+
+    <script src="assets/js/holder/holder.js"></script>
+    <script src="assets/js/google-code-prettify/prettify.js"></script>
+
     <script src="assets/js/application.js"></script>
 
 
diff --git a/docs/templates/layout.mustache b/docs/templates/layout.mustache
index d0039b346..9557ec44f 100644
--- a/docs/templates/layout.mustache
+++ b/docs/templates/layout.mustache
@@ -109,7 +109,6 @@
     <!-- Placed at the end of the document so the pages load faster -->
     <script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>
     <script src="assets/js/jquery.js"></script>
-    <script src="assets/js/google-code-prettify/prettify.js"></script>
     <script src="assets/js/bootstrap-transition.js"></script>
     <script src="assets/js/bootstrap-alert.js"></script>
     <script src="assets/js/bootstrap-modal.js"></script>
@@ -123,6 +122,10 @@
     <script src="assets/js/bootstrap-carousel.js"></script>
     <script src="assets/js/bootstrap-typeahead.js"></script>
     <script src="assets/js/bootstrap-affix.js"></script>
+
+    <script src="assets/js/holder/holder.js"></script>
+    <script src="assets/js/google-code-prettify/prettify.js"></script>
+
     <script src="assets/js/application.js"></script>
 
 
diff --git a/docs/templates/pages/base-css.mustache b/docs/templates/pages/base-css.mustache
index 17f446b3d..b042e34a5 100644
--- a/docs/templates/pages/base-css.mustache
+++ b/docs/templates/pages/base-css.mustache
@@ -1762,9 +1762,9 @@
 
           <p>{{_i}}Add classes to an <code>&lt;img&gt;</code> element to easily style images in any project.{{/i}}</p>
           <div class="bs-docs-example bs-docs-example-images">
-            <img src="http://placehold.it/140x140" class="img-rounded">
-            <img src="http://placehold.it/140x140" class="img-circle">
-            <img src="http://placehold.it/140x140" class="img-polaroid">
+            <img data-src="holder.js/140x140" class="img-rounded">
+            <img data-src="holder.js/140x140" class="img-circle">
+            <img data-src="holder.js/140x140" class="img-polaroid">
           </div>
 <pre class="prettyprint linenums">
 &lt;img src="..." class="img-rounded"&gt;
diff --git a/docs/templates/pages/components.mustache b/docs/templates/pages/components.mustache
index 0a655d6de..6fa194702 100644
--- a/docs/templates/pages/components.mustache
+++ b/docs/templates/pages/components.mustache
@@ -1853,22 +1853,22 @@
             <ul class="thumbnails">
               <li class="span3">
                 <a href="#" class="thumbnail">
-                  <img src="http://placehold.it/260x180" alt="">
+                  <img data-src="holder.js/260x180" alt="">
                 </a>
               </li>
               <li class="span3">
                 <a href="#" class="thumbnail">
-                  <img src="http://placehold.it/260x180" alt="">
+                  <img data-src="holder.js/260x180" alt="">
                 </a>
               </li>
               <li class="span3">
                 <a href="#" class="thumbnail">
-                  <img src="http://placehold.it/260x180" alt="">
+                  <img data-src="holder.js/260x180" alt="">
                 </a>
               </li>
               <li class="span3">
                 <a href="#" class="thumbnail">
-                  <img src="http://placehold.it/260x180" alt="">
+                  <img data-src="holder.js/260x180" alt="">
                 </a>
               </li>
             </ul>
@@ -1880,7 +1880,7 @@
             <ul class="thumbnails">
               <li class="span4">
                 <div class="thumbnail">
-                  <img src="http://placehold.it/300x200" alt="">
+                  <img data-src="holder.js/300x200" alt="">
                   <div class="caption">
                     <h3>{{_i}}Thumbnail label{{/i}}</h3>
                     <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
@@ -1890,7 +1890,7 @@
               </li>
               <li class="span4">
                 <div class="thumbnail">
-                  <img src="http://placehold.it/300x200" alt="">
+                  <img data-src="holder.js/300x200" alt="">
                   <div class="caption">
                     <h3>{{_i}}Thumbnail label{{/i}}</h3>
                     <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
@@ -1900,7 +1900,7 @@
               </li>
               <li class="span4">
                 <div class="thumbnail">
-                  <img src="http://placehold.it/300x200" alt="">
+                  <img data-src="holder.js/300x200" alt="">
                   <div class="caption">
                     <h3>{{_i}}Thumbnail label{{/i}}</h3>
                     <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
@@ -1926,7 +1926,7 @@
 &lt;ul class="thumbnails"&gt;
   &lt;li class="span4"&gt;
     &lt;a href="#" class="thumbnail"&gt;
-      &lt;img src="http://placehold.it/300x200" alt=""&gt;
+      &lt;img data-src="holder.js/300x200" alt=""&gt;
     &lt;/a&gt;
   &lt;/li&gt;
   ...
@@ -1937,7 +1937,7 @@
 &lt;ul class="thumbnails"&gt;
   &lt;li class="span4"&gt;
     &lt;div class="thumbnail"&gt;
-      &lt;img src="http://placehold.it/300x200" alt=""&gt;
+      &lt;img data-src="holder.js/300x200" alt=""&gt;
       &lt;h3&gt;{{_i}}Thumbnail label{{/i}}&lt;/h3&gt;
       &lt;p&gt;{{_i}}Thumbnail caption...{{/i}}&lt;/p&gt;
     &lt;/div&gt;
@@ -1951,27 +1951,27 @@
           <ul class="thumbnails">
             <li class="span4">
               <a href="#" class="thumbnail">
-                <img src="http://placehold.it/360x270" alt="">
+                <img data-src="holder.js/360x270" alt="">
               </a>
             </li>
             <li class="span3">
               <a href="#" class="thumbnail">
-                <img src="http://placehold.it/260x120" alt="">
+                <img data-src="holder.js/260x120" alt="">
               </a>
             </li>
             <li class="span2">
               <a href="#" class="thumbnail">
-                <img src="http://placehold.it/160x120" alt="">
+                <img data-src="holder.js/160x120" alt="">
               </a>
             </li>
             <li class="span3">
               <a href="#" class="thumbnail">
-                <img src="http://placehold.it/260x120" alt="">
+                <img data-src="holder.js/260x120" alt="">
               </a>
             </li>
             <li class="span2">
               <a href="#" class="thumbnail">
-                <img src="http://placehold.it/160x120" alt="">
+                <img data-src="holder.js/160x120" alt="">
               </a>
             </li>
           </ul>
@@ -2243,7 +2243,7 @@
           <div class="bs-docs-example">
             <div class="media">
               <a class="pull-left" href="#">
-                <img class="media-object" src="http://placehold.it/64x64">
+                <img class="media-object" data-src="holder.js/64x64">
               </a>
               <div class="media-body">
                 <h4 class="media-heading">{{_i}}Media heading{{/i}}</h4>
@@ -2252,14 +2252,14 @@
             </div>
             <div class="media">
               <a class="pull-left" href="#">
-                <img class="media-object" src="http://placehold.it/64x64">
+                <img class="media-object" data-src="holder.js/64x64">
               </a>
               <div class="media-body">
                 <h4 class="media-heading">{{_i}}Media heading{{/i}}</h4>
                 Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
                 <div class="media">
                   <a class="pull-left" href="#">
-                    <img class="media-object" src="http://placehold.it/64x64">
+                    <img class="media-object" data-src="holder.js/64x64">
                   </a>
                   <div class="media-body">
                     <h4 class="media-heading">{{_i}}Media heading{{/i}}</h4>
@@ -2272,7 +2272,7 @@
 <pre class="prettyprint linenums">
 &lt;div class="media"&gt;
   &lt;a class="pull-left" href="#"&gt;
-    &lt;img class="media-object" src="http://placehold.it/64x64"&gt;
+    &lt;img class="media-object" data-src="holder.js/64x64"&gt;
   &lt;/a&gt;
   &lt;div class="media-body"&gt;
     &lt;h4 class="media-heading"&gt;{{_i}}Media heading{{/i}}&lt;/h4&gt;
@@ -2296,7 +2296,7 @@
             <ul class="media-list">
               <li class="media">
                 <a class="pull-left" href="#">
-                  <img class="media-object" src="http://placehold.it/64x64">
+                  <img class="media-object" data-src="holder.js/64x64">
                 </a>
                 <div class="media-body">
                   <h4 class="media-heading">{{_i}}Media heading{{/i}}</h4>
@@ -2304,7 +2304,7 @@
                   <!-- Nested media object -->
                   <div class="media">
                     <a class="pull-left" href="#">
-                      <img class="media-object" src="http://placehold.it/64x64">
+                      <img class="media-object" data-src="holder.js/64x64">
                     </a>
                     <div class="media-body">
                       <h4 class="media-heading">{{_i}}Nested media heading{{/i}}</h4>
@@ -2312,7 +2312,7 @@
                       <!-- Nested media object -->
                       <div class="media">
                         <a class="pull-left" href="#">
-                          <img class="media-object" src="http://placehold.it/64x64">
+                          <img class="media-object" data-src="holder.js/64x64">
                         </a>
                         <div class="media-body">
                           <h4 class="media-heading">{{_i}}Nested media heading{{/i}}</h4>
@@ -2324,7 +2324,7 @@
                   <!-- Nested media object -->
                   <div class="media">
                     <a class="pull-left" href="#">
-                      <img class="media-object" src="http://placehold.it/64x64">
+                      <img class="media-object" data-src="holder.js/64x64">
                     </a>
                     <div class="media-body">
                       <h4 class="media-heading">{{_i}}Nested media heading{{/i}}</h4>
@@ -2335,7 +2335,7 @@
               </li>
               <li class="media">
                 <a class="pull-right" href="#">
-                  <img class="media-object" src="http://placehold.it/64x64">
+                  <img class="media-object" data-src="holder.js/64x64">
                 </a>
                 <div class="media-body">
                   <h4 class="media-heading">{{_i}}Media heading{{/i}}</h4>
@@ -2348,7 +2348,7 @@
 &lt;ul class="media-list"&gt;
   &lt;li class="media"&gt;
     &lt;a class="pull-left" href="#"&gt;
-      &lt;img class="media-object" src="http://placehold.it/64x64"&gt;
+      &lt;img class="media-object" data-src="holder.js/64x64"&gt;
     &lt;/a&gt;
     &lt;div class="media-body"&gt;
       &lt;h4 class="media-heading"&gt;{{_i}}Media heading{{/i}}&lt;/h4&gt;
diff --git a/less/tests/css-tests.html b/less/tests/css-tests.html
index c0cb1485e..f4df422aa 100644
--- a/less/tests/css-tests.html
+++ b/less/tests/css-tests.html
@@ -107,13 +107,13 @@
 
 <div class="row">
   <div class="span4">
-    <img src="http://placehold.it/600x600" height="200">
+    <img data-src="holder.js/600x600" height="200">
   </div>
   <div class="span4">
-    <img src="http://placehold.it/600x600">
+    <img data-src="holder.js/600x600">
   </div>
   <div class="span4">
-    <img src="http://placehold.it/600x600">
+    <img data-src="holder.js/600x600">
   </div>
 </div>
 
@@ -121,13 +121,13 @@
 
 <div class="row">
   <div class="span4">
-    <img src="http://placehold.it/600x900" style="width: 200px;">
+    <img data-src="holder.js/600x900" style="width: 200px;">
   </div>
   <div class="span4">
-    <img src="http://placehold.it/200x300">
+    <img data-src="holder.js/200x300">
   </div>
   <div class="span4">
-    <img src="http://placehold.it/600x600">
+    <img data-src="holder.js/600x600">
   </div>
 </div>
 
@@ -996,16 +996,16 @@
 <h4>Default thumbnails (no grid sizing)</h4>
 <ul class="thumbnails">
   <li class="thumbnail">
-    <img src="http://placehold.it/260x180" alt="">
+    <img data-src="holder.js/260x180" alt="">
   </li>
   <li class="thumbnail">
-    <img src="http://placehold.it/260x180" alt="">
+    <img data-src="holder.js/260x180" alt="">
   </li>
   <li class="thumbnail">
-    <img src="http://placehold.it/260x180" alt="">
+    <img data-src="holder.js/260x180" alt="">
   </li>
   <li class="thumbnail">
-    <img src="http://placehold.it/260x180" alt="">
+    <img data-src="holder.js/260x180" alt="">
   </li>
 </ul>
 
@@ -1014,17 +1014,17 @@
 <ul class="thumbnails">
   <li class="span3 offset3">
     <a href="#" class="thumbnail">
-      <img src="http://placehold.it/260x180" alt="">
+      <img data-src="holder.js/260x180" alt="">
     </a>
   </li>
   <li class="span3">
     <a href="#" class="thumbnail">
-      <img src="http://placehold.it/260x180" alt="">
+      <img data-src="holder.js/260x180" alt="">
     </a>
   </li>
   <li class="span3">
     <a href="#" class="thumbnail">
-      <img src="http://placehold.it/260x180" alt="">
+      <img data-src="holder.js/260x180" alt="">
     </a>
   </li>
 </ul>
@@ -1034,17 +1034,17 @@
 <ul class="thumbnails">
   <li class="span3">
     <a href="#" class="thumbnail">
-      <img src="http://placehold.it/260x180" alt="">
+      <img data-src="holder.js/260x180" alt="">
     </a>
   </li>
   <li class="span3 offset3">
     <a href="#" class="thumbnail">
-      <img src="http://placehold.it/260x180" alt="">
+      <img data-src="holder.js/260x180" alt="">
     </a>
   </li>
   <li class="span3">
     <a href="#" class="thumbnail">
-      <img src="http://placehold.it/260x180" alt="">
+      <img data-src="holder.js/260x180" alt="">
     </a>
   </li>
 </ul>
@@ -1055,17 +1055,17 @@
     <ul class="thumbnails">
       <li class="span4">
         <a href="#" class="thumbnail">
-          <img src="http://placehold.it/260x180" alt="">
+          <img data-src="holder.js/260x180" alt="">
         </a>
       </li>
       <li class="span4">
         <a href="#" class="thumbnail">
-          <img src="http://placehold.it/260x180" alt="">
+          <img data-src="holder.js/260x180" alt="">
         </a>
       </li>
       <li class="span4">
         <a href="#" class="thumbnail">
-          <img src="http://placehold.it/260x180" alt="">
+          <img data-src="holder.js/260x180" alt="">
         </a>
       </li>
     </ul>