html source code protection

[mjvndhsb]

Hi,

I created a site with some kind of picture gallery and some weeks later I found 2 sites which were almost exact copies of it. One of those guys even linked my images directly from his site...I emailed him with no effect, then renamed my images. Two days later he linked them again
So are there any way to protect my code and entire content and make impossible stealing it(or at least much harder)
I can't use asp or any server side stuff.

Thanks