How to convert sys_id to Display Value in Scheduled Jobs script

[TienMinh]

Hello.  On a table I have a field "u_user_criteria" with list type and contains many values (sys_id) reference to another table. I want to get each Display Value of each value of this field for later use. First I tried to convert the field from string to array of substring, then loop through that array to get each string (each sys_id). Next I tried to convert each of that string of sys_id into Display Value, but I still don't know which way could I achieve that. 

    var tableCondition = new GlideRecord('u_im_categorization');

    tableCondition.addEncodedQuery('u_active=true');

    tableCondition.query();

    while (tableCondition.next()){ 

         var newUserCriteria = tableCondition.getValue('u_user_criteria');

         var useNewUserCriteria = newUserCriteria.split(",");

         for (var i=0;i<useNewUserCriteria.length;i++){

                //get each useNewUserCriteria[i] (it is currently a sys_id string) and turn it into Display Value.

                // getDisplayValue doesn't work here because I am looping through a field.

         }

    }