jquery - How do I add an alert message to this jquery code base?
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I like this function for only allowing numeric chars. Thanks to the help from this forum.

To help avoid end-user confusion, I want to also add an alert message that pops up if/when the user clicks any other key ["alert('Only Numerical data allowed')"].  So if they press the 'k' the above message will pop up.  Can anyone see how to set this code within this code base

**jsfiddle**: `http://jsfiddle.net/justmelat/EN8pT/`

**jquery**:

     $(document).ready(function () {
        $('input.numberinput').bind('keypress', function (e) {
            return (e.which != 8 && e.which != 0 && (e.which < 48 || e.which > 57) && e.which != 46) ? false : true;
        });
    });​

**html**

    <div class="containercontent">
        
             <div class="label">Enter a number:</div>
            <input type="text" name="txtNumber1" id="txtNumber1" value=""  class="numberinput" />
    
             <div class="label">Enter a number:</div>
            <input type="text" name="txtNumber2" id="txtNumber2" value="" class="numberinput" />
        </div>

