function pop_window(URL, width, height) {
	var width = width? width : 800;
	var height = height? height : 600;
	day = new Date();
	id = day.getTime();
	eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width="+ width +",height="+ height +"');");
}