function addEvent(obj, evType, fn){ 
	if (obj.addEventListener){ 
		obj.addEventListener(evType, fn, false); 
		return true; 
	} else if (obj.attachEvent){ 
		var r = obj.attachEvent("on"+evType, fn); 
		return r; 
	} else { 
		return false; 
	} 
}

function popupwin(url,w,h) {
	var features =	'scrollbars=yes, toolbar=no, status=no, menubar=no ' +
					',resizable=no, location=no, directories=no ' +
					',left=' + ((screen.width-w)/2) +
					',top='  + ((screen.height-h)/2) +
					',width=' + w + ',height=' + h;
	myWin =	window.open(url,'WinName',features);
	myWin.focus();
	return false;
}