Problem with base tag using relative url Options

[tleave2000]

I read here that you can use a relative address for the base address for resolving URLs on a page. That's exactly what I want, but I can't get my relative base URL to be recognised.

I can get an absolute base url to work, but that's really not what I want, because it would mean I had to change all the base tags when I wanted to edit my website off line on my computer.

Here's a link to the pages where I'm having the problem: my proto website. There's a little more explanation there.

Hope you can help.