polyfill window.offsetWidth and window.offsetHeight

gistfile1.txt

//polyfill window.offsetWidth and window.offsetHeight

var windowOffset = function()
{
  var getOffset = function()
	{
		if(typeof(_cacheResize) === "function")
		{
			_cacheResize
		}

		window.offsetWidth = (function()
		{
		    if(window.innerWidth!= undefined)
		    {
		        return window.innerWidth;
		    }
		    else
		    {
		        var _b= document.body, 
		        _d= document.documentElement;
		        return Math.max(_d.clientWidth, _b.clientWidth);
		    }
		})();

		window.offsetHeight= (function()
		{
		    if(window.innerHeight!= undefined)
		    {
		        return window.innerHeight;
		    }
		    else
		    {
		        var _b= document.body, 
		        _d= document.documentElement;
		        return Math.max(_d.clientHeight, _b.clientHeight);
		    }
		})();
	}

	var _cacheResize = window.onresize;
	window.onresize = function()
	{
		_cacheResize();
		getOffset();
	}
	getOffset();
}

//invoke function
windowOffset();