Zafar Ahmed, Linkingpro -
I just simply used html to merge two images, one is the woman with sharee(.jpg), and another one is the watermark image(.png/.gif). No scripting there, so you can use it in static or dynamic pages. And this is probably one of the easiest and safest ways to protect your images in web.
linkingpro, if you think the solution suites fine with your need, then i will provide you the source code.
Before that, take a deep look at that site again (the url I provided before).
Let me know what you think.