/*
 * (c)2006 Dean Edwards/Matthias Miller/John Resig
 * Special thanks to Dan Webb's domready.js Prototype extension
 * and Simon Willison's addLoadEvent
 *
 * For more info, see:
 * http://dean.edwards.name/weblog/2006/06/again/
 * http://www.vivabit.com/bollocks/2006/06/21/a-dom-ready-extension-for-prototype
 * http://simon.incutio.com/archive/2004/05/26/addLoadEvent
 *
 * Thrown together by Jesse Skinner (http://www.thefutureoftheweb.com/)
 *
 * Slightly modified by David "Dewi" Young:
 *     broadened KHTML regexp
 *     in IE hack, replaced void(0) with false to work better in a https context
 *     corrected IE hack markup
 *     amended window.onload fallback not to clobber any existing handler
 *     removed reference to Array.push() unsupported in IE5
 *
 * To use: call addDOMLoadEvent one or more times with functions, ie:
 *
 *    function something() {
 *       // do something
 *    }
 *    addDOMLoadEvent(something);
 *
 *    addDOMLoadEvent(function() {
 *        // do other stuff
 *    });
 *
 */

function addDOMLoadEvent(func) {
	if (!window.__load_events) {
		var init = function () {
			// quit if this function has already been called
			if (arguments.callee.done) return;

			// flag this function so we do not do the same thing twice
			arguments.callee.done = true;

			// kill the timer
			if (window.__load_timer) {
				clearInterval(window.__load_timer);
				window.__load_timer = null;
			}

			// execute each function in the stack in the order they were added
			for (var i=0;i < window.__load_events.length;i++) {
				window.__load_events[i]();
			}
			window.__load_events = null;
		};

		// for Mozilla/Opera9
		if (document.addEventListener) {
			document.addEventListener("DOMContentLoaded", init, false);
		}

		// for Internet Explorer
		/*@cc_on @*/
		/*@if (@_win32)
			document.write("<scr"+"ipt id='__ie_onload' defer src='javascript:false;'><\/scr"+"ipt>");
			var script = document.getElementById("__ie_onload");
			script.onreadystatechange = function() {
				if (this.readyState == "complete") {
					init(); // call the onload handler
				}
			};
		/*@end @*/

		// for Safari
		if (/KHTML|WebKit/i.test(navigator.userAgent)) { // sniff
			window.__load_timer = setInterval(function() {
				if (/loaded|complete/.test(document.readyState)) {
					init(); // call the onload handler
				}
			}, 10);
		}

		// for other browsers
		var oldonload = window.onload;
		if (typeof(window.onload) != 'function') {
			window.onload = init;
		} else {
			window.onload = function() {
				init();
				if (oldonload) {
					oldonload();
				}
			}
		}

		// create event function stack
		window.__load_events = [];
	}

	// add function to event stack
	window.__load_events[window.__load_events.length] = func;
}