Hi! This example very easily shows how an image can be created that looks fine on the website, yet when hotlinked or used elsewhere without this implementation displays a watermark. Try it out! Drag the image to another tab, or better yet, hotlink it in another page. Either way, the watermark is still there without the code here! View the source to see for yourself. Check out theajblog.com/blog/ for more cool and random blabbing!
