Hi,

I need to verify whether the user has entered alpha value for a numeric field and alert a message.

for that i used this code snippet, but it doesn't work for alpha values.

please check and rectify

<script language="javascript" type="text/javascript">

function validate()

{

                var bank_id = document.getElementById("<%=txt_bank_id.ClientID%>").value;

   if (bank_id=="")

      {

                 alert("Please enter bank code");

                 document.getElementById("<%=txt_bank_id.ClientID%>").focus();

                 return false;

      }

      else (!IsNumeric(bank_id))

       {

                 alert("Please enter numeric values only for bank code");

                 document.getElementById("<%=txt_bank_id.ClientID%>").focus();

                 return false;

       }

      else if (document.getElementById("<%=txt_bank_name.ClientID%>").value=="")

      {

                 alert("Please enter bank name");

                 document.getElementById("<%=txt_bank_name.ClientID%>").focus();

                 return false;

      }

}

</script>

try like this.
function validate()

{

                var bank_id = document.getElementById("<%=txt_bank_id.ClientID%>").value;

   if (bank_id=="")

      {

                 alert("Please enter bank code");

                 document.getElementById("<%=txt_bank_id.ClientID%>").focus();

                 return false;

      }

      if (!IsNumeric(bank_id))

       {

                 alert("Please enter numeric values only for bank code");

                 document.getElementById("<%=txt_bank_id.ClientID%>").focus();

                 return false;

       }

      

      if (document.getElementById("<%=txt_bank_name.ClientID%>").value=="")

      {

                 alert("Please enter bank name");

                 document.getElementById("<%=txt_bank_name.ClientID%>").focus();

                 return false;

      }

}
function IsNumeric(strString)
   //  check for valid numeric strings	
   {
   var strValidChars = "0123456789.-";
   var strChar;
   var blnResult = true;

   if (strString.length == 0) return false;

   //  test strString consists of valid characters listed above
   for (i = 0; i < strString.length && blnResult == true; i++)
      {
      strChar = strString.charAt(i);
      if (strValidChars.indexOf(strChar) == -1)
         {
         blnResult = false;
         }
      }
   return blnResult;
   }

 In javascript,you can use Regular Expressions like this:

<script type="text/javascript">

.......

var bankIdRegex = new RegExp("\\d");

if (! bank_id.match(bankIdRegex ))

{

alert("Please enter numeric values only for bank code");

document.getElementById("<%=txt_bank_id.ClientID%>").focus();

return false;

}

....

</script>