anchor.diff:  		imgObj.onclick =function (e) {};
   		hideGrid(parentProtocolDropDownInfo['gridDiv']);
   		piGridVisible = false;
  -		document.getElementById("studyCalendarEventPoint").setAttribute("disabled",true);
  -		document.getElementById("sequenceNumber").setAttribute("disabled",true);
  +		document.getElementById("studyCalendarEventPoint").setAttribute("readOnly",true);
  +		document.getElementById("sequenceNumber").setAttribute("readOnly",true);
  +		document.getElementById("studyCalendarEventPoint").value="";
  +		document.getElementById("sequenceNumber").value="";
   	}	
   	else
   	{
  
positive.code: 					<td width="69%" align="left" class="black_ar">
  						<html:hidden property="principalInvestigatorId"  />
  						<div>
  							<table border="0" width="29%" id="outerTable2" cellspacing="0" cellpadding="0">
  								<tr>
  									<td align="left" width="88%" height="100%" >
  										<div id="piDropDownIddiv" class="x-form-field-wrap" >
  
negative.code: 					<td width="69%" align="left" class="black_ar">
  						<html:hidden property="parentCollectionProtocolId"  />
  						<div>
  							<table border="0" width="28%" id="outerTable2" cellspacing="0" cellpadding="0">
  								<tr>
  									<td align="left" width="88%" height="100%" >
  										<div id="ppDropDownIddiv" class="x-form-field-wrap " >
  