获取窗口高度

对于当前浏览器

window.innerHeight 

对于IE 8及更低版本,使用

document.documentElement.offsetHeight;

如果需要较旧的浏览器,请使用:

var height = "innerHeight" in window 
               ? window.innerHeight
               : document.documentElement.offsetHeight; 

我正在使用:

doc = document;
var theHeight = Math.max(
    doc.body.scrollHeight, doc.documentElement.scrollHeight,
    doc.body.offsetHeight, doc.documentElement.offsetHeight,
    doc.body.clientHeight, doc.documentElement.clientHeight
);

在这里找到: Get document height (cross-browser) - James Padolsey

同时也发现 jQuery 做同样的事情:

// Either scroll[Width/Height] or offset[Width/Height] or client[Width/Height], whichever is greatest
// unfortunately, this causes bug #3838 in IE6/8 only, but there is currently no good, small way to fix it.
return Math.max(
  elem.body[ "scroll" + name ], doc[ "scroll" + name ],
  elem.body[ "offset" + name ], doc[ "offset" + name ],
  doc[ "client" + name ]
);

http://www.javascripter.net/faq/browserw.htm

请注意,使用的代码 document.body.offsetWidth 和 document.body.offsetHeight 必须在浏览器分析标记后执行。

更新: 试试这个

<script type="text/javascript">
<!--

 var viewportwidth;
 var viewportheight;

 // the more standards compliant browsers (mozilla/netscape/opera/IE7) use window.innerWidth and window.innerHeight

 if (typeof window.innerWidth != 'undefined')
 {
      viewportwidth = window.innerWidth,
      viewportheight = window.innerHeight
 }

// IE6 in standards compliant mode (i.e. with a valid doctype as the first line in the document)

 else if (typeof document.documentElement != 'undefined'
     && typeof document.documentElement.clientWidth !=
     'undefined' && document.documentElement.clientWidth != 0)
 {
       viewportwidth = document.documentElement.clientWidth,
       viewportheight = document.documentElement.clientHeight
 }

 // older versions of IE

 else
 {
       viewportwidth = document.getElementsByTagName('body')[0].clientWidth,
       viewportheight = document.getElementsByTagName('body')[0].clientHeight
 }
document.write('<p>Your viewport width is '+viewportwidth+'x'+viewportheight+'</p>');
//-->
</script>

发现 here