anchor.diff:  		{
   			
   			document.getElementById('ageAtCollection').value=no_year.toString();
  +			document.getElementById('ageAtCollection').readOnly=true;
   		}
   			
   	}
  
positive.code: 	encounterTimeStampDate=(Date)convertDateFormat.parse(collectionDateString);		
  	Integer newAgeAtCollection=AppUtility.yearsDiff(birthDateObject,encounterTimeStampDate);
  	showageDiffString=String.valueOf(newAgeAtCollection);
  }
  %>
  <html:form action="<%=formName%>">
  
negative.code: <%
  Date birthDateObject=(Date)request.getAttribute("dob");
  String birthDateString=""; 
  String collectionDateString=form.getCollectionDate(); 
  String showageDiffString=form.getAgeAtCollection();
  Date encounterTimeStampDate;
  int collectionMinute=0;		
  