How to get id attribute with Jquery : I'm trying to get departmentName's id value.I mean i need get departmentID.

example jSON

          {
        "departmentID": 1,
        "departmentName": "BT"
      },

my code 

     saveEvent:function(e){
     this.$el.find(".departmentName"); // getting "BT"
     this.$el.find(".departmentName").attr("departmentID");//this is not working

      this.render();

            },

