just copy and paste this on to your html site in the head tag
CODE
<script language="JavaScript">
<!--
/*
*/
var message="Hey YOU!\nStop Stealing my pictures or\nFACE THE PUNISHMENT!"
function click(e) {
if (document.all) {
if (event.button == 2) {
alert(message);
return false;
}
}
if (document.layers) {
if (e.which == 3) {
alert(message);
return false;
}
}
}
if (document.layers) {
document.captureEvents(Event.MOUSEDOWN);
}
document.onmousedown=click;
// -->
</script>