anchor.diff:  function VLProjectChecker() {
   
       this.idPre = "vl.";
  +    var specialKeys = new Array();
  +    specialKeys.push(8); //Backspace
   	
       this.checkDate = function (field,blanksAllowed) {
       	makeDirty();
  
positive.code: 				onkeyup="addDateSlashes(this, event);"
  				onchange="vl.checkDate(this,false);"
  				styleClass="text"
  				styleId="vl.initcd4DateForDisplay" maxlength="10"/>
  				<div id="vl.initcd4DateMessage" class="blank"></div>
  		</td>
  	</tr>
  
negative.code: 				onkeyup="addDateSlashes(this, event);"
  				onchange="vl.checkDate(this,false);"
  				styleClass="text"
  				styleId="vl.demandcd4Date" maxlength="10"/>
  				<div id="vl.demandcd4DateMessage" class="blank"></div>
  		</td>
  	</tr>
  