function PopupCenter(mypage) 
{ 
    var w = 800; 
    var h = 600; 
    var winl = (screen.width - w) / 2; 
    var wint = (screen.height - h) / 2; 
    winProps = 'height='+h+',width='+w+',top='+wint+',left='+winl+',resizable=1';
    window.open(mypage,"Report",winProps); 
}

function PopupCenter2(mypage) {
    var w = 900;
    var h = 900;
    var winl = (screen.width - w) / 2;
    var wint = (screen.height - h) / 2;
    winProps = 'height=' + h + ',width=' + w + ',top=' + wint + ',left=' + winl + ',resizable=1';
    window.open(mypage, "Report", winProps);
}