function pop_open(url, xw, yw)
{
    window.open(url, 'xsera_popup', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width='+xw+',height='+yw+',left=20,top=20');
}
function popUp(url) {
    popupWin=window.open(url,"win",'toolbar=0,location=0,directories=0,status=1,menubar=1,scrollbars=1,width=570,height=450');
    self.name = "mainWin"; 
}