function openwindow(Page) {
    w = 1220;
    h = 620;
    wleft = (screen.width - w) / 2;
    wtop = (screen.height - h) / 2;
    window.open(Page, "mywindow", "menubar=0,location=0,scrollbars=0,toolbar=0,status=0,resizable=0,width="+ w +",height="+ h +",top="+ wtop +",left="+ wleft +"");
    
    
//    'left=' + wleft + ', top=' + wtop + ', ' +
//    'location=no, menubar=no, ' +
//    'status=no, toolbar=no, scrollbars=no, resizable=no');
}