This should be a comment, but I can't do that yet.
You may not be asked to write code, but you may be asked to look at a piece of code and explain what it does. You'd be surprised how many people just look at something like that and immediately say "Beats me", or "I can't do that". I got my first job because I was one of the few who looked at a language I'd never seen and said "Well, I think this does this and this over here does that".
One of the questions that I throw at interviewees is before the interview when they are filling out information, is I ask them to explain in detail how to fix an egg. Or how to change a light bulb. I could care less about what the answer is, what I'm looking for is the detail approach. For example, if I am asking them to change a light bulb, I want them to consider things like ceiling height to get an appropriate ladder, bulb wattage, how to remove the light cover, down to the proper disposal of the bulb and cleanup of the leftover packaging. The last interviewee that I hired did nearly two pages on changing a lightbulb.
Also, while you may not be able to code in it, at least be prepared to discuss it intelligently. Know what AJAX actually stands for, etc. Don't lie about your qualifications, but if they ask about it, say "I haven't done this specifically, but I've done that which will translate over".
Be honest, relaxed and confident. That speaks more than you know. (Ok, maybe that was a bit more than a comment.)