Blog by Anoop Kumar Sharma

If you want client side validation on the text field to accept only numbers, then you can use the below function :

function allowNumbersOnly(event)
{
    var e = event;
    var keyCode = e.which || e.keyCode;

    if (keyCode> 31 && (keyCode< 48 || keyCode> 57))
        return false;

    return true;

}

The above function return true if number is entered, else false.
Call this function on keypress() event as $(“input#num”).keypress(allowNumbersOnly)