Image swap when saved

[Gooseberry]

I *think* what I'm looking for is javascript. I used it (~10) years ago, so I know it exists somewhere in the ether.

I wish to prevent people from saving pictures from a website, but I do not want to block right clicking.

I would like it to swap the image someone is trying to save for another one.
(I used to a giant smiley emoticon in the past ).

Can someone point me towards the relevant script, or suggest an alternative, please

[Deadweight]

Using JQuery:

$('img').bind('contextmenu', function(e) {
    return false;
});

http://jsfiddle.net/wM8Zm/622/

[Gooseberry]

Using JQuery:

$('img').bind('contextmenu', function(e) {
    return false;
});

http://jsfiddle.net/wM8Zm/622/

Ooooo - is it that simple? Wow! Thank you