function PopWindow(mypage, myname, w, h, scroll) {
    var winl = (screen.width - w) / 2;
    var wint = 25;
    winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable'
    win = window.open(mypage, myname, winprops)
    if (parseInt(navigator.appVersion) >= 4) { win.window.focus();
    }
}