Hi
You are thinking of something like <input type="password" ...> right? Then the answer is that it behaves just like type="text" except that it will be shown like ****** instead of the letters in the browser. You can test it with something like this:
Code:
<form action="#" method="get">
<input type="password" name="password" value="secret" />
<input type="submit" />
</form>
When you look at it in the browser, you can't see the password, but when you submit it, you'll see it in the address bar.