var newablak;
function winOpen(url,n,width,height){
    var sw=screen.width;
    var sh=screen.height;
    var left=sw?(sw-width)/2:0;
    var top=sh?(sh-height)/2:0;
    newablak=window.open(url,n,"width="+width+",height="+height+",top="+top+",left="+left+",directories=no,resizable=1,location=no,status=no,toolbar=no,scrollbars=yes");
}