javascript - How to watermark only original images? -

javascript - How to watermark only original images? -

i trying protect website content putting scripts deny right click , see source code in browsers. not sufficient. want know how watermark original file , not image seen on webpage.

for example, image users can see on web without watermark , when click right , select "open image in new tab" go "website.com/image.png" , see watermarked image.

is possible?

p.s.: sorry bad english, i'm not writer.

thanks

serving users image not watermarked not thought because can download best way watermark every images , render users slicing it. piece image , show image , hide water mark , whey open in new window total image loaded water mark

for creating watermark on fly php http://www.developphp.com/view.php?tid=1147

and slicing image don't know how know possible there many ways can zoom hide watermarks.

javascript image watermark