// JavaScript Document

function getViewportSize() 
{ 
 var size = [0, 0]; 

 if (typeof window.innerWidth != 'undefined') 
	 { 
	   size = [ window.innerWidth, window.innerHeight ]; 
	 } 
 else if (typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth != 'undefined' && document.documentElement.clientWidth != 0) 
	 { 
	   size = [ document.documentElement.clientWidth, document.documentElement.clientHeight ]; 
	 } 
 else 
	 { 
	   size = [ document.getElementsByTagName('body')[0].clientWidth, document.getElementsByTagName('body')[0].clientHeight ]; 
	 } 

 return size; 
}