hide duplicate values in lookup field on new form list

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  hi, i use the sharepoint 2010. i have a list with new form where is lookup field from another list. this field has duplicate values. i want that hide or remove those values. i tryed with jquery code

  <script src="http://code.jquery.com/jquery-1.11.0.min.js" type="text/javascript"></script><script>
  
  
  
  
  
  $( document ).ready(function() {
  var usedNames = {};
  $("select[Title='Ревизорска област'] > option").each(function () {
      if(usedNames[this.text]) {
          $(this).remove();
      } else {
          usedNames[this.text] = this.value;
      }
  });
  });</script>

  but this code does not works. in debugger window of IE10 i found

  

  how i hide duplicate values

  
  

  • Edited by gogi1000 Monday, September 14, 2020 12:22 PM edit

  Monday, September 14, 2020 12:20 PM