function NewWindow(mypage, myname) {
        var winl = (screen.width - 580) / 2;
        var wint = (screen.height - 580) / 2;
        winprops = 'height=400 ,width=460 ,top='+wint+',left='+winl+',scrollbars=no ,resizable'
        win = window.open(mypage, myname, winprops)
        if (parseInt(navigator.appVersion) >= 4) {win.window.focus();}
     }