function open_win (uri, w, h) {
    moveToX = screen.width / 2 - w / 2;
    moveToY = screen.height / 2 - h / 2;
    popup = open(uri, 'popup', 'width=' + w + ',height=' + h + ',left=' + 0 + ',top=' + 0 + ',screenX=' + moveToX + ',screenY=' + moveToX + ', resizable=yes, toolbar=no, location=no, status=yes, menubar=no, scrollbars=no');
    return true;
}

function openWin(uri, w, h) {
    moveToX = screen.width / 2 - w / 2;
    moveToY = screen.height / 2 - h / 2;
    popup = open(uri, 'popup', 'width=' + w + ',height=' + h + ',left=' + 0 + ',top=' + 0 + ',screenX=' + moveToX + ',screenY=' + moveToX + ', resizable=yes, toolbar=no, location=no, status=yes, menubar=no, scrollbars=yes');
    return true;
}