function GPopup() {
	var args = GPopup.arguments;
	var win;
	var url = args[0]; 
	var width = (args[1]) ? args[1] : 630;
	var height = (args[2]) ? args[2] : 450;
	var resizable = (args[3]) ? args[3] : 'yes';
	
	win = window.open(url, '', 'menubar=yes,status=yes,resizable=' + resizable + ',scrollbars=yes,height=' + height + ',width=' + width, false);
}