function addLoadEvent(func) {
	var after=(arguments.length > 1) ? arguments[1] : false;
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			if (!after) func();
			oldonload();
			if (after) func();
		}
	}
}