function popUp(url, myHeight, myWidth) {
    newwindow = window.open(url, 'name', 'top=' + Math.floor(screen.height / 2 - myHeight / 2) + ',left=' + Math.floor(screen.width / 2 - myWidth / 2) + ',height=' + myHeight + ',width=' + myWidth);
    if (window.focus) { newwindow.focus() }
    return false;
}

function popUpScroll(url, myHeight, myWidth) {
    newwindow = window.open(url, 'name', 'top=' + Math.floor(screen.height / 2 - myHeight / 2) + ',left=' + Math.floor(screen.width / 2 - myWidth / 2) + ',height=' + myHeight + ',width=' + myWidth + ',scrollbars=yes');
    if (window.focus) { newwindow.focus() }
    return false;
}