function popWindow(url, widthNumber, heightNumber) {
	day = new Date()
	id = day.getTime()
	topNumber = (screen.availHeight - heightNumber) / 2
	leftNumber = (screen.availWidth - widthNumber) / 2
	eval(
			"page" + id + " = window.open" 
			+ "('" + url + "'"
			+ ",'" + id + "'" 
			+ ",'" + "width=" + widthNumber 
			+ "," + "height=" + heightNumber 
			+ "," + "left=" + leftNumber 
			+ "," + "top=" + topNumber 
			+ "," + "toolbar=no" 
			+ "," + "scrollbars=no" 
			+ "," + "location=no" 
			+ "," + "statusbar=no"
			+ "," + "menubar=no"
			+ "," + "resizable=yes" 
			+ "')"
		)
}