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

Simpler one for me is

jQuery('.plan_eff').keyup(function () {     
  this.value = this.value.replace(/[^1-9\.]/g,'');
});