bootstrap中的thumbnails

thumbnails的用法：

<ul class="thumbnails">
    	<li class="span4">
        	<div class="thumbnail">
            	<img src="./bootstrap/docs-assets/js/holder.js/400*200" alt="400*200" style="width:400px; height:200px;" src="beijing.jpg" />
            </div>
        </li>
        <li class="span4">
        	<div class="thumbnail">
            	<img src="./bootstrap/docs-assets/js/holder.js/400*200" alt="400*200" style="width:400px; height:200px;" src="beijing.jpg" />
            </div>
        </li>
        <li class="span4">
        	<div class="thumbnail">
            	<img src="./bootstrap/docs-assets/js/holder.js/400*200" alt="400*200" style="width:400px; height:200px;" src="beijing.jpg" />
            </div>
        </li>
    </ul>
           

效果图：