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Number Validation

14 New Member

I need to check whether the user has entered a numeric value or not in a text box using Javascript. What function can be used for this?

Thanks in advance.

Apr 9 '09 #1
3 1469
8,658 Recognized Expert Moderator Expert
you could use isNaN() or the typeof operator.
Apr 9 '09 #2
14 New Member
That worked out.
Yeah thanks.
Apr 9 '09 #3
16,027 Recognized Expert Moderator MVP
I would recommend regular expressions, e.g.
Expand|Select|Wrap|Line Numbers
  1. /^-?\d*\.?\d+$/
Apr 10 '09 #4

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