function popUp(url, w, h) {
	day = new Date();
	id = day.getTime();
	leftVal = (screen.width-w) / 2;
	topVal = (screen.height-h) / 2;

	newWindow = window.open('' + url + '', '' + id + '', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=1,width=' + w + ',height=' + h + ',left=' + leftVal + ',top=' + topVal);
	
}