Thread: JavaScript for enter only characters

Hi. I am working on one live project where I use as.net as front and SQL as a backend. Also I use JavaScript for validation. In my form one field is there for that field I want to write JavaScript for use enters only characters not numeric value. Any solution would be highly appreciated.

The script that I have mentioned will definitely help you.

Code:

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

var fname=document.Form1.getElementById("f_name").value;
var chkok="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'";
var chkstr=document.Form1.fname.value;
var allvalid=true;
for(i=0;i
{
ch=chkstr.charAt(i);
for(j=0;j
if(ch==chkok.charAt(j));
break;
if(j==chkok.length)
{
allvalid=false;
break;
}
}
if(!allvalid)
{
alert("Please enter only Characters");
document.Form1.fname.focus();
return false; 
}

I suggest you to refer following example of JavaScript, which will give you something idea about the use of this script:

Code:

<SCRIPT language=Javascript type=”JavaScript/text”>
           function isNumberKey(evt)
      {
         var charCode = (evt.which) ? evt.which : event.keyCode
         if (charCode > 31 && (charCode < 48 || charCode > 57))
            return false;

         return true;
      }