新手：请问如何取得当前用户的分辨率是1024*768,还是800*600??

新手：请问如何取得当前用户的分辨率是1024768,还是800600??
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1<script>   
2screen.availWidth   
3screen.availHeight   
4//这两个可以返回客户端的分辨率，再做相应判断即可   
5</script>

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 1<body><script language="JavaScript">   
 2var s = "网页正文部分宽："+ document.body.clientWidth;   
 3s += "\r\n网页正文部分高："+ document.body.clientHeight;   
 4s += "\r\n网页正文部分上："+ window.screenTop;   
 5s += "\r\n网页正文部分左："+ window.screenLeft;   
 6s += "\r\n屏幕分辨率的高："+ window.screen.height;   
 7s += "\r\n屏幕分辨率的宽："+ window.screen.width;   
 8s += "\r\n屏幕可用工作区高度："+ window.screen.availHeight;   
 9s += "\r\n屏幕可用工作区宽度："+ window.screen.availWidth;   
10alert(s);   
11</script></body>