Event Handlers for Mobile phone functions?

[roattw]

I have a script to limit field characters to numbers only.  Works great on computer/html but not on Smartphones.  

<script>

function isNumberKey(evt){
    var charCode = (evt.which) ? evt.which : event.keyCode
    if (charCode > 31 && (charCode < 48 || charCode > 57))
        return false;
    return true;
}
document.getElementById('InsertRecordTIME2').onkeypress =isNumberKey;
</script>

 

Do smart phones use an entirely different set of event handlers or script?  Is it the .onkeypress or something more intense?

[MayMusic]

This is working for me on iPhone!