Code function validate Input number in textbox only.

 

Code function validate Input number in textbox only.
html

1. <input type="text" id="test_id" name="test" value="" oninput="validateInput(event)">

js function

1. function validateInput(event) {
2.    var input = event.target.value;
3.    if (!/^[0123456789 ]*$/.test(input)) {
4.       event.target.value = input.replace(/[^0123456789 ]/g, '');
5.    }
6. }