How to allow only numeric (0-9) in HTML inputbox using jQuery?

Question

I am creating a web page where I have an input text field in which I want to allow only numeric characters like (0,1,2,3,4,5...9) 0-9.

How can I do this using jQuery

Answer 1

Simple way to check that enter value is numeric is:

var checknumber = $('#textbox_id').val();

    if(jQuery.isNumeric(checknumber) == false){
        alert('Please enter numeric value');
        $('#special_price').focus();
        return;
    }