anchor.diff:                      <tr>
                        <td>
                   			<input class="autocomplete validate-notEmpty" type="text" id="healthcareSite-input"
  -                       				size="40"
  +                       				size="36"
   									<c:set var="_codeSite" value="" />
   									<c:set var="_nameSite" value="" />
   									<c:if test="${fn:length(command.study.studySites)>0}">	
  -									<c:set var="_codeSite" value="(${command.study.studySites[0].healthcareSite.nciInstituteCode})" />
  -									<c:set var="_nameSite" value="${command.study.studySites[0].healthcareSite.name}" />
  +										<c:set var="_codeSite" value="(${command.study.studySites[0].healthcareSite.nciInstituteCode})" />
  +										<c:set var="_nameSite" value="${command.study.studySites[0].healthcareSite.name}" />
   									</c:if>
                         				 value='<c:out value="${_nameSite} ${_codeSite}" />'/>
   								<input type="hidden" id="healthcareSite-hidden"
  -                        			name="study.studySites[0].healthcareSite" value="${command.study.studySites[0].healthcareSite.id}" />
  +                        			name="study.studySites[0].healthcareSite" value="${fn:length(command.study.studySites)>0?command.study.studySites[0].healthcareSite.id:""}" />
                   				<input type="button" id="healthcareSite-clear"
                          				 value="Clear"/>
                     		 	<tags:indicator id="healthcareSite-indicator"/>
  
positive.code: 	$(mode.basename + '-selected').show()
      }
  }
  
  function acCreate(mode) {
  	new Autocompleter.DWR(mode.basename + "-input", mode.basename + "-choices",
  	mode.populator, {
  
negative.code: 	afterUpdateElement: function(inputElement, selectedElement, selectedChoice) {
  		hiddenField=inputElement.id.split("-")[0]+"-hidden";
  	    $(hiddenField).value=selectedChoice.id;
  	 }})
      clearElement=document.getElementById(mode.basename + "-clear")
      if(clearElement!=null){
  	    Event.observe(mode.basename + "-clear", "click", function() {
  															$(mode.basename)?$(mode.basename).value = "":null
  															$(mode.inputElement()).value = ""
      })
      }
  }
  
  Event.observe(window, "load", function() {
  