anchor.diff:              <td>
                   <input type="text" id="investigators[PAGE.ROW.INDEX].startDate"
                           name="healthcareSite.investigatorGroups[${groupIndex}].siteInvestigatorGroupAffiliations[PAGE.ROW.INDEX].startDate"
  -                        class="date validate-DATE">
  +                        class="validate-notEmpty&&DATE">
                    <a href="#" id="investigators[PAGE.ROW.INDEX].startDate-calbutton">
                       <img src="<chrome:imageUrl name="b-calendar.gif"/>" alt="Calendar" width="17" height="16" border="0" align="absmiddle"/>
                   </a>
  
positive.code: 	        					<td><input type="text" name="healthcareSite.investigatorGroups[${groupIndex }].name" value="${newGroup?'': command.healthcareSite.investigatorGroups[groupIndex].name}" class="validate-notEmpty"/></td>
  	        				</tr>
  	        				<tr>
  	        					<td align="right"><b>Start Date:</b></td> 
  	        					<td><input type="text" id="formStartDate" name="healthcareSite.investigatorGroups[${groupIndex }].startDate" value="${newGroup?'': command.healthcareSite.investigatorGroups[groupIndex].startDateStr}"/>
  	        					 <a href="#" id="linkStartDate">
  			                    <img src="<chrome:imageUrl name="b-calendar.gif"/>" alt="Calendar" width="17" height="16" border="0" align="middle"/>
  			                	</a></td>
  			                </tr>
  	        				<tr>
  	        					<td align="right"><b>End Date:</b></td>
  	        					<td><input type="text" id="formEndDate" name="healthcareSite.investigatorGroups[${groupIndex }].endDate" value="${newGroup?'': command.healthcareSite.investigatorGroups[groupIndex].endDateStr}"/>
  	        					 <a href="#" id="linkEndDate">
  			                    <img src="<chrome:imageUrl name="b-calendar.gif"/>" alt="Calendar" width="17" height="16" border="0" align="middle"/>
  			                	</a></td>
  
negative.code: <script type="text/javascript" src="/c3pr/js/CalendarPopup.js"></script>
  <chrome:division title="Group">
  <form:form id="groupForm">
  <div id="errorsDiv">
  </div>
  	<c:if test="${!newGroup}">
  		<input type="hidden" name="groupId" id="groupId" value="${command.healthcareSite.investigatorGroups[groupIndex].id }"/>
  	</c:if>
  	<input type="hidden" name="decorator" value="nullDecorator"/>
          	<table border="0" width="100%">
  	        	<tr id="editGroup">
  	        		<td>
  	        			<table>
  