function clearmailafrnd()
{ 
 
   
        document.getElementById('<%=txt_InstName.ClientID%>').value='';
       
     document.getElementById('<%=txt_YourName.ClientID%>').value='';
      document.getElementById('<%=txt_Quali.ClientID%>').value='';
       document.getElementById('<%=TxtBx_Plan.ClientID%>').value='';
        document.getElementById('<%=TxtBx_STD1.ClientID%>').value='';
        document.getElementById('<%=TxtBxs_Num1.ClientID%>').value='';
        document.getElementById('<%=txt_Contact.ClientID%>').value='';
         
         document.getElementById('<%=txt_YourMail.ClientID%>').value='';
          document.getElementById('<%=txt_YourMail.ClientID%>').value='';
        document.getElementById('<%=RegularExpressionValidator15.ClientID%>').style.display='none';
        document.getElementById('<%=RegularExpressionValidator16.ClientID%>').style.display='none';
        document.getElementById('<%=RegularExpressionValidator5.ClientID%>').style.display='none';
        document.getElementById('<%=reg_YourMail.ClientID%>').style.display='none';
        
   return true;
}