Question

I try to make a RegEx for validating a form in javascript. The RegEx should only allow letters comma and punctuation. For instance I have this string:

Hi, this is a test of RegEx. Does it work

I’ve tried the following

/^[A-Za-z0-9,. ]{3,50}$/; 

But it doesn’t seems to work. Solutions?

Thanks!

EDIT:

This is my code:

<script type="text/javascript">
  var RE_SSN = /^[A-Za-z0-9,. ]{3,50}$/; 

  function checkSsn(ssn){

   if (RE_SSN.test(ssn)) {
  alert("OK"); 
  javascript:addAppointment(document.forms[0])

    } else {
       alert("NO!");
   }
  }
  </script>

<div id="r">
    <label for="receipt">Receipt</label><input type="checkbox"     name="receipt" value="1"/>
</div>

<input type="button" value="Post it" onclick="checkSsn(this.form.content.value);"/>

Answer 1

You might need to escape the “.” as that is a special character in regex.

/^[A-Za-z0-9,\. ]{3,50}$/; 

Actually probably not. Try using http://www.regextester.com/ – I was able to get it to work anyway. Can you show us the full code for how you’re implementing this?