function OpenNewWindow(mypage,w,h,myname) {
    var winl = (screen.width-w)/2;
    var wint = (screen.height-h)/2;

    settings='height=' + h +  ',width=' + w + ',top=' + wint + ',left=' + winl + ',scrollbars=no,toolbar=no'
    win=window.open(mypage,myname,settings)
                
    if(parseInt(navigator.appVersion) >= 4) {
        win.window.focus();
    }
}