How to detect FULL height of window in javascript

How can I detect the full height of a screen in javascript? This includes the Y-Overfl开发者_JAVA百科ow. So far, I haven't been able to find a script for it.

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document.body.offsetHeight

or

$('body').height();

if you're using jQuery

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Try this:

function pageWidth() {return window.innerWidth != null? window.innerWidth: document.body != null? document.body.clientWidth:null;}
function pageHeight() {return window.innerHeight != null? window.innerHeight: document.body != null? document.body.clientHeight:null;} 

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Do you mean the height of the page content? If so, this should do the job.