elgg ajax in action

in start.php
$plugin_path = elgg_get_plugins_path();
$base = $plugin_path . 'custom_modules/actions/';

    // action ajax page
 elgg_register_action("custom_modules/assign_assessment_type", "$base/assign_assessment_type.php");


//add below code in view

$("#assessment_type").click(function(){
  
   var steps = 1;
   var mod_id = 10;
    elgg.action('custom_modules/assign_assessment_type', {
        data: { mod_id: mod_id,steps_id:steps},
        success: function(json) {
            //alert(json);
        }
        });

  });
});