js得到当前窗口内的宽度和高度

var s = "";  
s += "\r\n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网页可见区域宽："+ document.body.offsetWidth +" (包括边线和滚动条的宽)";  
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;  
s += "\r\n你的屏幕设置是 "+ window.screen.colorDepth +" 位彩色";  
s += "\r\n你的屏幕设置 "+ window.screen.deviceXDPI +" 像素/英寸";  
alert(s);