Regular expression or complete javaScript to validate Salary (a 'Double' number)?

I want to validate salary text field with java script in my html page having syntax like Max six digits, a dot, max two digits after dot and it can be done in two ways:

1) I make u开发者_如何学Pythonser only enter integer values and append a dot and two zeros at the end by some javaScript code.

2) Check the entry given by user at time of formValidation with a regex that can pass the right syntax as i described above...

Which will be the simpler one? And how can it be achieved?

Max six digits, a dot, max two digits after dot

/^\d{1,6}(?:\.\d{0,2})?$/

It actually means between 1 and six digits, followed by optionally a dot and a max of two digits.

If you want to require the dot, then use

/^\d{1,6}\.\d{0,2}$/

If you want to allow commas, e.g. 150,000, then try replacing \d{1,6} with

\d{1,3}(?:,?\d{3})?