Respectfully, there seems to be a problem more serious than just being afraid of a job interview. Forgive me if my impression is wrong but in some of your earlier posts you indicated you'd like to improve your confidence and self-esteem.

These are common issues and I can partly relate to them, being an introverted guy by nature. Still, if your fears go so far as to hinder you from achieving your major goals I think it might be better to confront them once and for all or they will impede your progress for the rest of your life.

I am no psychologist but perhaps there are some simple steps that might resolve your real issues. Think of your true fears. Everybody has some weak points. Some are afraid of snakes, some can't cope with failure (or even the thought of it), others hate formally speaking in public (count me in!), maybe it is unsuccessful relationships in the past or problems in the family. Deep down I'm sure you know already what it is.

Now think about it again. Why should any fears from your past stand in the way of your future? Try to visualize yourself at the job interview. What's the worst thing that can happen to you? You'll get laughed at and thrown out. Might be embarassing but on a 1-10 scale, it ranks dead low on my disaster list. So low it's not even worth worrying about. We've all made a fool of ourselves many more times that we can remember. So what? It's not even a disaster, just a little embarassment. Remember, if people laugh at you, it's best to laugh with them. Don't take life too seriously because it really isn't. Our existence in this world is so short, why make it miserable? Make the best out of it you can, be a good man but most of all, relax and enjoy life. Unless you're Buddhist, you won't get another chance.

The more you interact with people (especially new contacts) the more comfortable you'll be at a job interview. You have absolutely nothing to lose! Find something that you're really good at and feel the pride. You're no worse than anybody else out there so why should you feel inferior or inadequate in any way?

Finally, start working out regularly if you're not doing already. Your mind and body are closely connected and you should keep both in good shape. Another very simple thing that has helped me a great deal in difficult times is Zen meditation. You can learn it in a few days but it will take your concentration and inner peace to a whole new level.
http://www.mro.org/zmm/teachings/meditation.php

Anyway, best of luck and may you reach every goal you ever wanted to achieve!