Phone number validation in form for JS

<form action="cakes.php" method="post">

  <tr>

    <td>Phone Number *</td>

    <td><input id="phone"  name="phone" required /></td>

  </tr>

</form>

<script type="text/javascript">

$("#phone").change(function()

{  

  var phoneno = /^\d{10}$/;  

  if(($(this).val().match(phoneno)) )

   {  

      return true;  

        }  

      else  

        {  

        alert("Enter the 10 Digit Mobile Number");  

        return false;  

        }  

});

</script>