鼠标经过时行变色
<style type="text/css">
table{
color:#565;
font:12px Arial, Helvetica, sans-serif;
}
td{
border-top:2px solid #fff;
border-bottom:3px solid #b3de94;
padding:9px;
}
tr{
background:#dfc;
}
tr:hover,tr.hover{
background-color:#595;
color:#fff;
}
</style>
</head>
<body>
<table summary="book list">
<caption>Book List</caption>
<tr>
<TD>Title</TD>
<TD>ID</TD>
<TD>Country</TD>
<TD>price</TD>
<TD>download</TD>
</tr>
<tr >
<TD>tom</TD>
<TD>41553552</TD>
<TD>China</TD>
<TD>$254</TD>
<TD>dkir</TD>
</tr>
<tr>
<TD>tom</TD>
<TD>41553552</TD>
<TD>China</TD>
<TD>$254</TD>
<TD>dkir</TD>
</tr>
<tr>
<TD>tom</TD>
<TD>41553552</TD>
<TD>China</TD>
<TD>$254</TD>
<TD>dkir</TD>
</tr>
</table>
<script language="javascript">
var rows=document.getElementsByTagName('tr');//rows是一个行的数组，包含当前页中有的行
for(var i=0;i<rows.length;i++)
{
rows[i].onmouseover=function(){
this.className='hover';
}
rows[i].onmouseout=function(){
this.className='';
}
}
</script>