function openPopup(url, width, height) {
	width = !isNaN(width) ? width : 640
	height = !isNaN(height) ? height : 480
	myDate = new Date()
	newWin = window.open(url, 'VTSpopup' + myDate.getHours() + myDate.getMinutes() + myDate.getSeconds(), "width=" + width + ",height=" + height + ",location=no,menubar=no,resizable=no,scrollbars=yes,status=no,titlebar=no,toolbar=no", true)
	newWin.focus()
}