jQuery Simple Example

by Akhil Yalla

HTML

<script src="//www.addressfinder.co.nz/assets/v2/widget.js"></script>
Try to enter special characters and alphabets:
<input type="text" id='number' name="mobile"/>

CSS

input
{
  margin:4px;
  padding:5px;
}

JavaScript

$(document).ready(function() 
{
  $("#number").keydown(function(event)

    {

        if ( $.inArray(event.keyCode,[46,8]) !== -1 || (event.keyCode == 65 && event.ctrlKey === true) || (event.keyCode >= 35 && event.keyCode <= 39))

        {

            return;

        }

        else
        {

            if (event.shiftKey || (event.keyCode < 48 || event.keyCode > 57) && (event.keyCode < 96 || event.keyCode > 105 ))

            {

                event.preventDefault();

            }

        }

    });
});