How to use base_url() in js file

[eluser]keld[/eluser]
Ok thanks it's working except i had to do this in my header instead:

Code:

<scr1pt type="text/javascr1pt">
    // < ![CDATA[
           base_url = '&lt;?= base_url();?&gt;';
    //]] >
</scr1pt>

or it wouldn't work