/**
 * Portable registration for onload event handlers.
 *
 * Based on code from page 434 of "JavaScript: The Definitive Guide"
 * by David Flanagan (5th Edition).
 *
 * Copyright retained by original holders where applicable.
 *
 * (c) copyright 2010-02-02, Robert Impey
 */

function runOnLoad(f)
{
	if (runOnLoad.loaded) {
		f();
	} else {
		runOnLoad.funcs.push(f);
	}
}

runOnLoad.funcs = [];
runOnLoad.loaded = false;

runOnLoad.run = function()
{
	if (runOnLoad.loaded) return;
	
	for (var i = 0; i < runOnLoad.funcs.length; i++) {
		try {
			runOnLoad.funcs[i]();
		} catch (e) {
			/*
			 * Carry on.
			 */
		}
	}
	
	runOnLoad.loaded = true;
	delete runOnLoad.funcs;
	delete runOnLoad.run;
}

if (window.addEventListener) {
	window.addEventListener("load", runOnLoad.run, false);
} else if (window.attachEvent) {
	window.attachEvent("onload", runOnLoad.run)
} else {
	window.onload = runOnLoad.run;
}