$('#categorySelector').change(function() {
    var baseObjURL = "<?php echo $proto . "://" . $_SERVER['HTTP_HOST'].rtrim(dirname($_SERVER['PHP_SELF']), '/\\'). "/"."main_objects_list.php"; ?>";
    var selValID = $("#categorySelector").val();

    //console.log( "change selector: %s", selValID);
 
             alert('change selector func');
   
    if( selValID == "separator" )
    {
      $("#categorySelector").val("all");
      selValID = "all";
    }
    
    if( selValID == null )
    {
      selValID = "all";
    }

    baseObjURL += "?catId=" + selValID + "&sortObj=<?php echo $_SESSION['OBJSORTOBJ']?>&sortType=<?php echo $_SESSION['OBJSORTTYPE']?>";
    
    $("#objects_frame").attr("src", baseObjURL);
  });