function popup(url, width, height, hwnd)
{
    newwnd = window.open(url, hwnd,'toolbar=no, location=no, scrollbars=1, width=' + width + ', height=' + height + ', left=100, top=100, alwaysRaised=true');
    newwnd.focus();
   
    if (newwnd.opener == null)
    {
        newwnd.opener = self;
    };
};