float regexp

[Alessandro Ilardo]

Hello there,
I'm not an expert of regexp and I need an help.

I've got a js script which accept personal regexp to check form values.

In a field I'd allow float numers as 00.00
On the net I found this:
__floatNum = "/^((\d+(\.\d*)?)|((\d*\.)?\d+))$/";
which doesn't get the value mentioned above.

Any helps are welcome.
Thanks in advance

[Eric Pascarello]

If it has to be XX.XX
^\d{2}\.\d{2}$

Eric

[Bauke Scholtz]

Don't forget to re-escape backslashes if you put the RE in the regexp object directly.

var f = '00.00';
var re = '^\\d+\\.\\d+$';
if (f.match(re)) {
    alert('match');
} else {
    alert('no match');
}

Or if you want nn.nn exactly, like Eric said, then do:

var f = '00.00';
var re = '^\\d{2}\\.\\d{2}$';
if (f.match(re)) {
    alert('match');
} else {
    alert('no match');
}

[ October 19, 2006: Message edited by: Bauke Scholtz ]

[Alessandro Ilardo]

thanks for your help. I partially solved the problem. The field is actually destinated for quantity values starting from 0.00, so should allow numbers such as:
1
2.1
0.1
216.09
12765.00
etc.

Your code actually works fine but accept only values like 20.00

(I know, my mistake. I didn't express myself correctly).

[ October 19, 2006: Message edited by: Alessandro Ilardo ]
[ October 19, 2006: Message edited by: Alessandro Ilardo ]

[Eric Pascarello]

try:

^\d+(\.\d+)?$

Eric

[Eric Pascarello]

Only thing is why reinvent the wheel when you have: http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Functions:isNaN

Eric