JS获取网页各元素的高宽值（转自：http://www.cnblogs.com/achilleswar/archive/2010/10/28/1863091.html）

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

document.documentElement应参见

http://www.w3school.com.cn/xmldom/dom_htmlelement.asp