帮忙看看怎么不行
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>选择参加名单</title>
<style type="text/css">
ul{width:120px; height:200px; border:1px solid #000; list-style:none;padding:0px; margin:0px;}
div{margin:5px;}
table{width:80px; height:220px; float:left; height:250px; padding:0px;
margin:0px;}
td{text-align:center;}
input{width:50px;}
#all{height:300px; width:700px;}
#daixuan{width:120px; height:220px; float:left; height:250px; padding:0px;
margin:0px;}
#canxuan{width:120px; height:220px; float:left; height:250px; padding:0px;
margin:0px;}
</style>
<script type="text/javascript">
function sel(){
var del=document.getElementById('dxdiv').childNodes
for(var i=0;i<del.length;i++){
del[i].onmouseover()=function addli(){
var text=del[i].innerHTML;
var add=document.getElementById('cxdiv').lastChild;
var newnode=document.createElement("li");
newnode.value=text;
add.appendChild(newnode);
del[i].parentNode.removeChild(del[i])
}
}
}
</script>
</head>
<body>
<div id="all">
<div id="daixuan">
<font size="+1">待选名单</font>
<ul id="dxdiv">
<li>王伟</li>
<li>李佳</li>
<li>赵俊杰</li>
<li>董可</li>
</ul>
</div>
<table>
<tr>
<td>
<input type="button" id="xuanze" value=">>" onclick="sel()"/>
</td>
</tr>
</table>
<div id="canxuan">
<font size="+1">参选名单</font>
<ul id="cxdiv">
</ul>
</div>
</div>
</body>
</html>
