function popup(mylink)
{
    var windowname = "";
    if (! window.focus){
        return true;
    }
    var href;
    if (typeof(mylink) == 'string'){
       href=mylink;
    }else{
       href=mylink.href;
    }
    window.open(href, windowname,  'width=680,height=480,scrollbars=yes,status=yes,toolbar=yes, resizable=yes,menubar=yes,location=yes');
    return false;
}