[thelist] numeric only regex?

[Matt Warden]

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Tom Dell'Aringa wrote:
> I should have said, this is JavaScript. Based on the above, and I was trying something similar, I
> have this:
> 
> var ff = RegExp("[0-9]*").test(numtext.value)
> alert(ff)
> 
> But it's not right, I get true every time. We need to exclude alpha characters and special
> characters (like the *). My guess is my syntax is not quite right?

If you say [0-9]*, you're saying you want to match a number zero or
more times. Thus, everything will work here, even '*NKS^&' (matching a
number 0 times).

/^[0-9]+$/.test(varToTest)

This says: starting with the beginning of varToTest (^), match one or
more (+) characters in the range 0-9 and then match the end of
varToTest ($). Therefore, from start to end, varToTest must consist of
characters in the range 0-9.

hth,

- --
Matt Warden
Miami University
Oxford, OH, USA
http://mattwarden.com


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