How to pass variable from events.php to javascript

Hi, I have my events.php file wich is running ok. But how can I take let say for instant session_name, and alert it when the lightbox open. So I want to transfer my variable from DB to js variable and alert it.
tks
Seby

    <?php
    session_start();
       include ('../../../codebase/connector/scheduler_connector.php');
       include ('../../common/config.php');
       
       $res=mysql_connect($server, $user, $pass);
       mysql_select_db($db_name);
       mysql_query("SET NAMES utf8");
       $scheduler = new schedulerConnector($res);
       /*$list = new OptionsConnector($res);
       $list->render_table("types","typeid","typeid(value),name(label)");*/
       
       
       //-------------Sub Type dropdown ..........................
       
       $OtherDropdown = new OptionsConnector($res);
       $OtherDropdown->render_sql("select id as value, session_type as label from session_type where user_id = '".$_SESSION['user_id']."'","","value,label");
       //$OtherDropdown->render_table("session_type","session_type","id(value),session_type(label)");
        $scheduler->set_options("session_type",$OtherDropdown);
       
       //------------- Eof Sub Type dropdown ..........................
       
       
       
       
       //-------------Photographers dropdown ..........................
       
       $OtherDropdown2 = new OptionsConnector($res);
       $OtherDropdown2->render_sql("select id as value, full_name as label from photographers where user_id = '".$_SESSION['user_id']."'","","value,label");
        $scheduler->set_options("photographers",$OtherDropdown2);
       
       //------------- Eof Photographers dropdown ..........................
       
       
       
       
       //-------------Rooms dropdown ..........................
       
       $OtherDropdown2 = new OptionsConnector($res);
       $OtherDropdown2->render_sql("select id as value, room_name as label from rooms where user_id = '".$_SESSION['user_id']."'","","value,label");
        $scheduler->set_options("rooms",$OtherDropdown2);
       
       //------------- Eof Rooms dropdown ..........................
       

       
       //-------------RealSubType dropdown ..........................
       
       $OtherDropdown = new OptionsConnector($res);
       $OtherDropdown->render_sql("select id as value, session_subtype as label from session_subtype where user_id = '".$_SESSION['user_id']."'","","value,label");
       //$OtherDropdown->render_table("session_type","session_type","id(value),session_type(label)");
        $scheduler->set_options("realsubtype",$OtherDropdown);
       
       //------------- Eof RealSubType dropdown ..........................
       
       
       //-------------Reference dropdown ..........................
       
       $OtherDropdown3 = new OptionsConnector($res);
       $OtherDropdown3->render_sql("select id as value, session_reference as label from session_reference where user_id = '".$_SESSION['user_id']."'","","value,label");
       //$OtherDropdown->render_table("session_type","session_type","id(value),session_type(label)");
        $scheduler->set_options("reference",$OtherDropdown3);
       
       //------------- Eof Reference dropdown ..........................
       
       
       
       
       
       $clients = new OptionsConnector($res);
       
       $clients->render_sql("select id as value, full_name as label from clients where user_id = '".$_SESSION['user_id']."'","","value,label");
       
       $scheduler->set_options("clients",$clients);
          //$scheduler->enable_log("log.txt",true);
         
    function mycode($action){
         $action->set_value("user_id", $_SESSION['user_id']);
    }
    $scheduler->event->attach("beforeProcessing", "mycode");

    /*
    function validatecode($data)
    {
       $start_date=$data->get_value("start_date");
       if($data->get_value("start_date"))
       {
          $photographers_id=$data->get_value("photographers_id");
          $rooms_id=$data->get_value("rooms_id");
          $user_id=$data->get_value("user_id");
          $id=$data->get_value("id");
          if($photographers_id!=0 && $photographers_id!="" && $photographers_id!="null")
          {
             $sql_chk_photo = mysql_query("select id from sessions where id!='".$id."' AND user_id='".$user_id."' AND photographers_id = '".$photographers_id."' AND '".$start_date."' between start_date  AND end_date");
             if(mysql_num_rows($sql_chk_photo))
             {
                $error=2;
             }
          }
          if($rooms_id!=0 && $rooms_id!="" && $rooms_id!="null")
          {
             $sql_chk_room = mysql_query("select id from sessions where id!='".$id."' AND user_id='".$user_id."' AND rooms_id = '".$rooms_id."' AND '".$start_date."' between start_date  AND end_date");
             if(mysql_num_rows($sql_chk_room))
             {
                $error=3;
             }
          }
          if($error==2  || $error==3)
          {
             $data->set_response_text("Already this Photographer or Room assigned on this time. Please Use Different");
             $data->invalid();
          }
       }
    }
    $scheduler->event->attach("beforeInsert","validatecode");
    $scheduler->event->attach("beforeUpdate","validatecode");*/
       
       
       //$scheduler->enable_log("log.txt",true);
       //$scheduler = new schedulerConnector($res);
       //$scheduler->render_table("events","event_id","start_date,end_date,event_name,details,types,clients");
       

       if ($scheduler->is_select_mode()){ // ' code for loading data
    $SQL = "SELECT s.*, p.full_name, r.room_name  from sessions as s left join session_reference as sr on sr.id=s.session_reference left join session_subtype as st on st.id=s.session_subtype left join rooms as r on r.id=s.rooms_id left join photographers as p on p.id=s.photographers_id WHERE s.user_id='".$_SESSION['user_id']."'  ".$_SESSION['pid']." ";
    $scheduler->render_sql($SQL,"id","start_date,end_date,session_name,session_name,session_notes,session_type,session_location,type,photographers_id,rooms_id, session_reference,session_subtype,client_id,full_name,room_name", "", "");



    }
    else {    // code for other operations - i.e. update/insert/delete
    $scheduler->render_table("sessions","id","start_date,end_date,session_name,session_notes,session_type,session_location,type,photographers_id,rooms_id,session_subtype,session_reference,client_id,user_id");
    }
    $ac="";
    if($ac="delete")
    {
       mysql_query("DELETE FROM cal_todo where session_id='".$id."' AND user_id='".$_SESSION['user_id']."' ");
    }

       

       
    ?>

Unfortunately there is no standard way to transfer custom data with connector.
You can set custom properties for separate events, but there is no way to set a custom data globally, for all scheduler.