function addLoadListener(fn) {
	if (typeof window.addEventListener != 'undefined')
		window.addEventListener('load', fn, false);
	else if (typeof document.addEventListener != 'undefined')
		document.addEventListener('load', fn, false);
	else if (typeof window.attachEvent != 'undefined')
		window.attachEvent('onload', fn);
	else {
		var oldfn = window.onload;
		if (typeof window.onload != 'function')
			window.onload = fn;
		else
			window.onload = function() {
				oldfn();
				fn();
			};
	}
}

function addEvent(elm, evType, fn, useCapture) { 
	if (elm.addEventListener) { 
		elm.addEventListener(evType, fn, useCapture); 
		return true;
   	} 
	else if (elm.attachEvent) {
		var r = elm.attachEvent('on' + evType, fn);
	   	return r; 
	}
	else  
		elm['on' + evType] = fn; 
}