function popupPreorder() {
var windowprops = "location=no,scrollbars=no,menubars=no,toolbars=no,resizable=no" +
",left=" + 1 + ",top=" + 1 + ",width=" + 650 + ",height=" + 420; //視窗位置及大小

var URL = "preorder.aspx";
popup = window.open(URL,"MenuPopup",windowprops);
}