Javascript function need allow numbers, dot and comma

Question

I need to create a function to allow numbers dot and comma. So anyone corrects the following function

function on(evt) {
  var theEvent = evt || window.event         


        

Answer 1

The Regex that I made for numbers following format of COMMA9.2

Example

1. 1,350.88
2. 120.00
3. 1,500,999.24
4. 100
5. 10000000

RegEx

^(\d+|\d{1,3},\d{3}|\d{1,3},\d{3},\d{3}|\d{1,3}(,\d{3})*|\d{1,3}(,\d{3})*\.\d+)$