JS 구현 페이지 로드 완료 판단

(function()
{
	var ie = !!(window.attachEvent && !window.opera);
	var wk = /webkit\/(\d+)/i.test(navigator.userAgent) && (RegExp.$1 < 525);
	var fn = [];
	var run = function () { for (var i = 0; i < fn.length; i++) fn[i](); };
	var d = document;
	d.ready = function (f){
		if (!ie && !wk && d.addEventListener) return d.addEventListener('DOMContentLoaded', f, false);
		if (fn.push(f) > 1) return;
		if (ie)
		(function (){
			try { d.documentElement.doScroll('left'); run(); }
			catch (err) { setTimeout(arguments.callee, 0); }
		})();
		else if (wk)
		var t = setInterval(function () {
			if (/^(loaded|complete)$/.test(d.readyState))
				clearInterval(t), run();
		}, 0);
	};
})();

~function()
{
	var FNArray=[];
	var D = document;
	window.onReady = function(fallBackFunction)
	{
		var argu=[];
		for (var i=1,len=arguments.length; i<len; i++){
			argu.push(arguments[i]);
		}
		var is_ie = !!(window.attachEvent && !window.opera);
		if (window.readyBound) return fallBackFunction.apply(this,argu);
		if(!is_ie) return fallBackFunction.apply(this,argu);
		FNArray.push(fallBackFunction);
		readyBound = true;
		var ready = 0;
		// Mozilla, Opera and webkit nightlies currently support this event
		if (D.addEventListener)
		{
			// Use the handy event callback
			D.addEventListener("DOMContentLoaded",
			function(){
				D.removeEventListener("DOMContentLoaded", arguments.callee, false);
				if (ready) return;
				ready = 1;
				for (var i=0,len=FNArray.length; i<len; i++)
				{
					FNArray[i] ? FNArray[i].apply(this,argu) : 0;
				}
			},
			false);
		// If IE event model is used
		}else if (D.attachEvent){
			// ensure firing before onload,
			// maybe late but safe also for iframes
			D.attachEvent("onreadystatechange",
			function(){
				if (D.readyState === "complete")
				{
					D.detachEvent("onreadystatechange", arguments.callee);
					if (ready) return;
					ready = 1;
					for (var i=0,len=FNArray.length; i<len; i++)
					{
						FNArray[i] ? FNArray[i].apply(this,argu) : 0;
					}
				}
			});
			// If IE and not an iframe
			// continually check to see if the D is ready
			if (D.documentElement.doScroll && window == window.top)(function(){
				if (ready) return;
				try{
					// If IE is used, use the trick by Diego Perini
					// http://javascript.nwbox.com/IEContentLoaded/
					D.documentElement.doScroll("left");
				}catch(error){
					setTimeout(arguments.callee, 0);
					return;
				}
				ready = 1;
				for (var i=0,len=FNArray.length; i<len; i++){
					FNArray[i] ? FNArray[i].apply(this,argu) : 0;
				}
			})();
		}
	};
}();