Javascript如何使用clientWidth,scrollWidth获取窗口宽度和高度

Javascript通过clientWidth,scrollWidth获取窗口宽度和高度

<SCRIPT   LANGUAGE="JavaScript">  
var s = "网页可见区域宽 ："+ document.body.clientWidth;  
s += "\r\n网页可见区域高："+ document.body.clientHeight;   
s += "\r\n网页可见区域高："+ document.body.offsetHeight +" (包括边线的宽)";  
s += "\r\n网页正文全文宽："+ document.body.scrollWidth;  
s += "\r\n网页正文全文高："+ document.body.scrollHeight;  
s += "\r\n网页被卷去的高："+ document.body.scrollTop;  
s += "\r\n网页被卷去的左："+ document.body.scrollLeft;  
s += "\r\n网页正文部分上："+ window.screenTop;  
s += "\r\n网页正文部分左："+ window.screenLeft;  
s += "\r\n屏幕分辨率的高："+ window.screen.height;  
s += "\r\n屏幕分辨率的宽："+ window.screen.width;  
s += "\r\n屏幕可用工作区高度："+ window.screen.availHeight;  
s += "\r\n屏幕可用工作区宽度："+ window.screen.availWidth;  
alert(s); 
</SCRIPT>