GlideAjax Server Call

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
  // Exit if form is loading or value is empty
  if (isLoading || newValue === '') {
    return;
  }

  // Configuration: Update these values for your needs
  var scriptIncludeName = 'UserInfoUtils';     // Name of your Script Include
  var functionName = 'getUserOpenTickets';     // Function in the Script Include
  var targetField = 'u_open_tickets_count';    // Field to populate with result

  // Create GlideAjax object
  var ga = new GlideAjax(scriptIncludeName);

  // Set the function to call (maps to Script Include method)
  ga.addParam('sysparm_name', functionName);

  // Add parameters to send to server
  ga.addParam('sysparm_user_id', newValue);

  // Optional: Add more parameters as needed
  // ga.addParam('sysparm_table', 'incident');
  // ga.addParam('sysparm_active', 'true');

  // Make the asynchronous call
  ga.getXMLAnswer(function(response) {
    // This callback function runs when server responds

    // Handle the response
    if (response) {
      // Set the target field with the response
      g_form.setValue(targetField, response);

      // Optional: Show info message
      g_form.addInfoMessage('User has ' + response + ' open tickets');

    } else {
      // Handle empty or error response
      g_form.setValue(targetField, '0');
      gs.addErrorMessage('Unable to retrieve user information');
    }
  });

  // Optional: Show loading message
  g_form.addInfoMessage('Loading user information...');
}