For those who want that their comment box be extensible only vertically,add a resize: vertical; in #comment rule in your CSS file to your wordpress theme.That’s it,the problem is solved.
I apologize for violation of forum rules,
here’s the link to my site and comment box http://www.tajnisvet.net/nova-strana and this is the link to the comments.php http://pastebin.com/iBr6qb5Z and this one for css http://pastebin.com/2EkyRj4n
