转自：http://www.cnblogs.com/yzst/archive/2011/10/13/2209686.html
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>鼠标经过时单元格变色</title>
<style type="text/css">
table{
color:#565;
font:12px Arial, Helvetica, sans-serif;
}
td{
border-bottom:2px solid #b3de94;
border-top:3px solid #fff;
padding:9px;
}
tr:hover,td.hover{
background-color:#595;
color:#fff;
}
tr{
background-color:#dfc;
}
</style>
</head>
<body>
<table summary="book list">
<caption>Book List</caption>
<tr>
<td>Title</td>
<td>Tom</td>
<td>Aom</td>
<td>Tina</td>
<td>Os</td>
</tr>
<tr>
<td>tom</td>
<td>1554658</td>
<td>china</td>
<td>$785</td>
<td>download</td>
</tr>
<tr>
<td>tom</td>
<td>1554658</td>
<td>china</td>
<td>$785</td>
<td>download</td>
</tr>
<tr>
<td>tom</td>
<td>1554658</td>
<td>china</td>
<td>$785</td>
<td>download</td>
</tr>
<tr>
<td>tom</td>
<td>1554658</td>
<td>china</td>
<td>$785</td>
<td>download</td>
</tr>
</table><br />
<script language="javascript">
var cells=document.getElementsByTagName('td');//rows是一个行的数组帮韩当前页中所有的行
for(var i=0;i<cells.length;i++)
{
cells[i].onmouseover=function(){
this.className='hover';
//上变色
for(var j=0;j<cells.length;j++)
if(cells[j]==this){
cells[j%5].className='hover';
cells[j-j%5].className='hover';
//左变色
}
}
cells[i].onmouseout=function(){
this.className='';
for(var j=0;j<cells.length;j++)
if(cells[j]==this){
cells[j%5].className='';
cells[j-j%5].className='';
//左变色
}
//上恢复
//左恢复
}
}
</script>
</body>
</html>