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
	}
	setCookie("viewport",viewportwidth + ',' + viewportheight, 10);