function returnViewport(){
	var viewPortVars = new Array();
	// the more standards compliant browsers (mozilla/netscape/opera/IE7) use window.innerWidth and window.innerHeight
	if (typeof window.innerWidth != 'undefined') {
		viewPortVars.width = window.innerWidth;
		viewPortVars.height = 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)
	{
		viewPortVars.width = document.documentElement.clientWidth;
		viewPortVars.height = document.documentElement.clientHeight;
	}
	// older versions of IE
	else{
		viewPortVars.width = document.getElementsByTagName('body')[0].clientWidth;
		viewPortVars.height = document.getElementsByTagName('body')[0].clientHeight;
	};
	return viewPortVars;
};