I got a request to hide a couple of modules from non-managers. Here is how I did it:

var GMF_ClientUserUtil = Class.create();

GMF_ClientUserUtil.prototype = Object.extendsObject(AbstractAjaxProcessor, {

//Given a user sys_id get the manager

  isManager: function(userId) {

  var returnVal;

  try{

      //if the param is null, use the current user's ID

      if(JSUtil.nil(userId)){

            userId = gs.getUserID();

      }

      var util = new GMF_UserUtil();

      returnVal = util.isManager(userId);

      }catch(e){

          gs.logError(e.message,'SI:GMF_ClientUserUtil->isManager()');

      }

      return returnVal;

  }

});

var GMF_UserUtil = Class.create();

GMF_UserUtil.prototype = {

  initialize: function () {

  },

  //Check to see if the user is anyone's manager (only looks at active users)

  isManager: function(userId){

            var gr = new GlideAggregate('sys_user');

            gr.addActiveQuery();

            gr.addQuery('manager', userId);

            gr.addAggregate('COUNT');

            gr.query();

            gr.next();

            if( gr.getAggregate('COUNT') > 0 ){

                      return true;

            }

            return false;

  },

  type: 'GMF_UserUtil'

}

I created a global UI Script: (The syntax highlighter gave me > 10 minutes worth of grief when trying to format this so I gave up.)

document.observe("dom:loaded", function() {
var ga = new GlideAjax('GMF_ClientUserUtil');
ga.addParam('sysparm_name', 'isManager');
ga.getXML(isManagerCallback);

});

function isManagerCallback(response){

var answer = response.responseXML.documentElement.getAttribute("answer");

//Hide the "Incident - Manager" module

if (answer == 'false' && parent.frames[0].document.getElementById('module.b2ca14786f319500b8d923fc5d3ee4c7')) {

| | parent.frames[0].document.getElementById('module.b2ca14786f319500b8d923fc5d3ee4c7').style.display = 'none'; |
| --------------------------------------------------------------------------------------------------------------- |

}

//Hide the "Request Items - Manager" module

if (answer == 'false' && parent.frames[0].document.getElementById('module.d335eefd6f1f5900aaaa23fc5d3ee403')) {

| | parent.frames[0].document.getElementById('module.d335eefd6f1f5900aaaa23fc5d3ee403').style.display = 'none'; |
| --------------------------------------------------------------------------------------------------------------- |

}

}