anchor.diff:  						onkeydown="javascript:fnKeyDownHandler(this, event);"
   						onkeyup="javascript:fnKeyUpHandler_A(this, event); return false;"
   						onkeypress="javascript:return fnKeyPressHandler_A(this, event);"
  -						onchange="fnChangeHandler_A(this, event);filterAbbreviation();">
  +						onchange="fnChangeHandler_A(this, event);retrieveInstrumentAbbreviation();">
   						<option value="">
   							--?--
   						</option>
  
positive.code: </table>
  <br>
  
  <script language="JavaScript">
  <!--//
    /* populate a hashtable containing instrument type manufacturers */
    var instrumentTypeManufacturers=new Array();    
    <c:forEach var="item" items="${allInstrumentTypeToManufacturers}">  	
      var manufacturers=new Array();
      <c:forEach var="manufacturer" items="${allInstrumentTypeToManufacturers[item.key]}" varStatus="count">
    		manufacturers[${count.index}]='${manufacturer}';  	  		
      </c:forEach>
      instrumentTypeManufacturers['${item.key}'] = manufacturers;
    </c:forEach> 
    
      
    function filterAbbreviation() {  
      var instrumentType=document.getElementById("instrumentType");
      var instrumentAbbr=document.getElementById("instrumentAbbr");
      var allInstruments=new Array();    
      <c:forEach var="instrument" items="${allInstruments}">  	    
       if (instrumentType.value=="${instrument.type}") {
            instrumentAbbr.value="${instrument.abbreviation}";
        }
      </c:forEach> 
    }
  //-->
  </script>
  
  
negative.code: <%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic"%>
  <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
  <script type="text/javascript" src="javascript/editableDropDown.js"></script>
  <script type='text/javascript' src='javascript/InstrumentManager.js'></script>
  <script type='text/javascript' src='dwr/interface/InstrumentManager.js'></script>
  <script type='text/javascript' src='dwr/engine.js'></script>
  
  <table border="0" align="center" cellpadding="3" cellspacing="0"
  	class="topBorderOnly" summary="">
  	<tr>
  	<tr class="topBorder">
  		<td class="formTitle" colspan="4">
  