I have
<html>
<head>
<meta...>
</head>
<body oncontextmenu="return false" onselectstart="return false" ondragstart="return false">
....
</body>
</html>
People cannot use RIGHT CLICK to select anything espcially the pictures. I know there are ways to get by to copy the content. But I think it is good enough to stop a lot of general public from copying.
However, as I have developed the site to be more complicate and I found out a few days ago that I can click and select the content. I wonder what other feature I added could disable the "return false".