Username validation

[Kryptix]

Hi,

 

I have this JavaScript/jQuery regex:

 

var username_regex = /^[A-Za-z0-9 ]{2,12}$/;

 

It's perfect except:

 

I want it to return false if the username starts or ends with a space.

I want it to turn false if there's more than 1 space in a row.

 

Can anyone help me please?

 

Cheers

[requinix]

Start with any number of non-space characters, then repeat a set of one space followed by more non-spaces. Problem is that it's harder to do the 2-12 requirement.

/^[a-z0-9]+( [a-z0-9]+)*$/i

For the length just do x.length>=2 and x.length

[Kryptix]

Start with any number of non-space characters, then repeat a set of one space followed by more non-spaces. Problem is that it's harder to do the 2-12 requirement.

/^[a-z0-9]+( [a-z0-9]+)*$/i

For the length just do x.length>=2 and x.length<=12.

Thanks!