function popup(mylink, windowname, width, height, scroll)
{
        if (! window.focus)return true;
        var href;
        if (typeof(mylink) == 'string'){
        href=mylink;
        }
        else
        {
        href=mylink.href;
        }
        if (scroll==1){
        window.open(href, windowname, 'scrollbars=yes,status=no,width='+width+',height='+height);
        }else{
        window.open(href, windowname, 'scrollbars=no,status=no,width='+width+',height='+height);
        }
        return false;
}