Why is this JS code matching underscores?

The same regexp that seems to be working on the server side in Perl
seems to be failing on the client side in JavaScript... I want to match
a string that's exactly 7 alpha-numeric characters. So I used...

var reSCode = /^[a-zA-z0-9]{7}$/;

....

if (frm.elements["ServiceCode"].value == "") {
alert("Service Code is a required field.");
return;
} else {
strServiceCode = frm.elements["ServiceCode"].value;
if (!(reSCode.test(strServiceCode))) {
alert("The Service Code that you entered blah blah...");
return;
}
}

However, when the user enters an underscore re.test() seems to be
returning true... Can somebody explain why?

thx,

--williamc

The same regexp that seems to be working on the server side in Perl
seems to be failing on the client side in JavaScript... I want to match
a string that's exactly 7 alpha-numeric characters. So I used...

var reSCode = /^[a-zA-z0-9]{7}$/;

Too legit to shift.

var reSCode = /^[a-zA-Z0-9]{7}$/;

http://www.crockford.com/javascript/lint.html

Douglas Crockford wrote:

Too legit to shift.

var reSCode = /^[a-zA-Z0-9]{7}$/;

Say what?



--wmc.

OK, so "Too legit to shift." is pretty cryptic, but what he correctly
pointed out is that these two lines:

var reSCode = /^[a-zA-z0-9]{7}$/; // Your version
var reSCode = /^[a-zA-Z0-9]{7}$/; // Douglas Crokford's version.

are not the same, and therein lies your problem.

"williamc" <temp4_NO_SPAM_ (AT) williamc (DOT) com> wrote

Douglas Crockford wrote:


Too legit to shift.

var reSCode = /^[a-zA-Z0-9]{7}$/;


Say what?



--wmc.

Doh...

One of those staring right at deals. Altho I still don't know what "Too
legit to shift" means...

thx all,

-wmc...



Dana Cartwright wrote:

OK, so "Too legit to shift." is pretty cryptic, but what he correctly
pointed out is that these two lines:

var reSCode = /^[a-zA-z0-9]{7}$/; // Your version
var reSCode = /^[a-zA-Z0-9]{7}$/; // Douglas Crokford's version.

are not the same, and therein lies your problem.

"williamc" <temp4_NO_SPAM_ (AT) williamc (DOT) com> wrote in message
news:3F71DE3A.3E9C9F2C (AT) williamc (DOT) com...


Douglas Crockford wrote:


Too legit to shift.

var reSCode = /^[a-zA-Z0-9]{7}$/;


Say what?



--wmc.

That's when you feel that with your parachute pants, your mind for
rhyme, and your two hype feet, you can't be bothered to hit the
"shift" key.

Jamie ;-)
WebMaster, MCHammerUSA.com
http://www.mchammerusa.com/

Okay, so not really.

On Wed, 24 Sep 2003 19:18:17 GMT, williamc
<temp4_NO_SPAM_ (AT) williamc (DOT) com> wrote:

Doh...

One of those staring right at deals. Altho I still don't know what "Too
legit to shift" means...

thx all,

-wmc...



Dana Cartwright wrote:

OK, so "Too legit to shift." is pretty cryptic, but what he correctly
pointed out is that these two lines:

var reSCode = /^[a-zA-z0-9]{7}$/; // Your version
var reSCode = /^[a-zA-Z0-9]{7}$/; // Douglas Crokford's version.

are not the same, and therein lies your problem.

"williamc" <temp4_NO_SPAM_ (AT) williamc (DOT) com> wrote in message
news:3F71DE3A.3E9C9F2C (AT) williamc (DOT) com...


Douglas Crockford wrote:


Too legit to shift.

var reSCode = /^[a-zA-Z0-9]{7}$/;


Say what?



--wmc.

Ok, I'm parting to hit it...

--williamc



Jamie Jackson wrote:

That's when you feel that with your parachute pants, your mind for
rhyme, and your two hype feet, you can't be bothered to hit the
"shift" key.