根据不同的分辨率选择不同的css文件

<SCRIPT language=javascript>
<!-- Begin
if (screen.width == 640)
{
document.write('<link href="/Css/Style.css" rel="stylesheet" type="text/css" />');
} 
if (screen.width == 1440)
{
document.write('<link href="/Css/tp5.css" rel="stylesheet" type="text/css" />');
} 
if (screen.width == 1024)
{
document.write('<link href="/Css/tp3.css" rel="stylesheet" type="text/css" />');
}
if (screen.width == 1280)
{
document.write('<link href="/Css/tp1.css" rel="stylesheet" type="text/css" />');
} 
if (screen.width == 1600)
{
document.write('<link href="/Css/tp2.css" rel="stylesheet" type="text/css" />');
}
 // End -->
</SCRIPT>