if (document.body)
	{
	var width = (document.body.clientWidth);
	var height = (document.body.clientHeight);
	}
else if(window)
	{
	var width = (window.innerWidth);
	var height = (window.innerHeight);
	}
else if(document.documentElement)
	{
        var width = (document.documentElement.clientWidth);
        var height = (document.documentElement.clientHeight);
        }
else
	{
        var width = "undefined";
        var height = "undefined";
        }