function popUp(url, width, height) {
	if (!width) width = 400;
	if (!height) height = 300;
	
	window.open(url, Math.floor(Math.random() * 100 +1) ,'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,copyhistory=no,width='+ width +',height='+ height +',screenX=150,screenY=150,top=200,left=350')
}

function confirmMessage(msg) {
	if(confirm(msg)) {
		return true;
	} else {
		return false;
	}
}