Problem with Regular Expression

Hi all,

First of all I must say that I am a newbie when it comes to javascript language.
Here is my problem.

I need validate in `myForm` this string:
Code:
09 - AB800
And try this Regular Expression:
Code:
if (!myForm.Folder.value.match("/^0[0-9] \- [a-z0-9]{5,20}$/i", "")) {
     window.alert('Not valid.');
     myForm.Folder.focus();
     myForm.Folder.select();
     return false;
     }
But the correct string:
Code:
09 - AB800
is not validate. Why?

I need also optional add this other string:
Code:
09 - AB800/test
when the string part `/test` is not required.

Can you explain any one or any sample code related this...

Your help would be very appreciated.
thanks for your time and hints.

Thanks in advance,
Chevy.