ajax-json-preg_match problem

Hello,

I am doing an ajax check of input form. I have java sending this.value to ajax-json.php which is doing a check and sending $error as json object back to java.

Everything works fine, preg_match does it thing, but I want it to allow special charters like ćčšđž. My regexp looks like this right now:

/^[a-z]+$/i

I tried to add special charters:

/^[a-z-šŠđĐžŽČčĆć]+$/i 

but it won't work.

header(); is set to 'Content-type: application/json; charset=utf-8' and there should not be a problem, but again, it exists.

If any of you guys can give me some hand with this, I would appreciate it.

Regards.

I just tried this regexp with common value, and it works, but with $_GET["value"] it doesnt.