Htaccess related issues

htaccess problems
It was almost half a day, or it didn't work out.
1. Under root is known as the ABC folder, login screen login.php
2. Create a. htaccess file under Root, which is actually a www.test.com/login.php of access when the user enters Www.test.com/abc.
3. That's what my. htaccess wrote.
Rewriteengine on
Rewriterule ^$/login.php
4. The result is that the page is found, but the pictures and styles on the page are all invalidated. View src, the picture path is http://www.test.com/abc/img/login_top_01.gif, and the real one should be http://www.test.com/img/login_top_01.gif

I would like to ask you tall people, this should be how to change.

------Solution--------------------
login.php Add a sentence

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