Javascript - validation, numbers only

Question

I\'m trying to get my login form to only validate if only numbers were inputted. I can it to work if the input is only digits, but when i type any characters after a number,

Answer 1

Match against /^\d+$/. $ means "end of line", so any non-digit characters after the initial run of digits will cause the match to fail.

Edit:

RobG wisely suggests the more succinct /\D/.test(z). This operation tests the inverse of what you want. It returns true if the input has any non-numeric characters.

Simply omit the negating ! and use if(/\D/.test(z)).