三层相套底端对齐问题,请css高手指教!!
我有个三层相套底端对齐问题:img在countbox_bar里,countbox_bar在countbox里 
 我想让他们都对齐底端,img和countbox_bar实现了,可countbox_bar和countbox却弄不好了,请css高手指教!!   
 #countbox   {   
 	height:   180px; 
 	width:   350px; 
 	border:   1px   solid   #CCCCCC; 
 	float:   left; 
 	margin:   0px; 
 } 
 #countbox_bar   { 
 	list-style-type:   none; 
 	background-color:   #FFCC99; 
 	width:   15px; 
 	float:   left; 
 	height:10px; 
 	margin-right:   5px; 
 	margin-left:   5px; 
 	position   :   relative;   
 } 
 .countimg   { 
             position:   absolute; 
 	bottom:0; 
 }   
  <ul   id= "countbox ">  
  <li   id= "countbox_bar ">  <img   src= "11.JPG "   height= "5px "   width= "15px "   class= "countimg "/>  </li>  
  <li   id= "countbox_bar ">  <img   src= "11.JPG "   height= "5px "   width= "15px "   class= "countimg "/>  </li>  
  </ul>
------解决方案--------------------是不是要这样? 
  <html xmlns= "http://www.w3.org/1999/xhtml ">  
  <head>  
  <meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 " />  
  <title> 无标题文档 </title>  
  <style type=text/css>  
 * { 
 padding:0; 
 margin:0; 
 } 
 #countbox { 
 height: 180px; 
 width: 350px; 
 border: 1px solid #CCCCCC; 
 float: left; 
 margin: 0px; 
 position:relative; 
 } 
 #countbox_bar { 
 background-color: #FFCC99; 
 width:15px; 
 height:30px; 
 border: 1px solid #f00; 
 position:absolute; 
 bottom:0; 
 } 
 .countimg { 
 position:absolute; 
 bottom:0; 
 } 
  </style>  
  </head>  
  <body>  
  <ul id= "countbox ">  
  <li id= "countbox_bar " style= "left:100px; ">  <img src= "# " height= "5px " width= "15px " class= "countimg "/>  </li>  
  <li id= "countbox_bar " style= "left:40px; ">  <img src= "# " height= "5px " width= "15px " class= "countimg "/>  </li>  
  </ul>  
  </body>  
  </html>  
------解决方案--------------------绝对定位的话不设置left就重叠一块勒 
 你可以动态设置它们的left值啊,呵呵 
 其他就不知道勒,我不是程序员,不太懂
------解决方案--------------------加上这个就自动排列了   
  <script language= "javascript ">  
 window.onload=function(){ 
   var bars  = document.getElementById( "countbox ").childNodes; 
   for(var i=0;i <bars.length;i++){ 
     bars[i].style.left=i*30+10; 
   } 
 } 
  </script>