Prevent users from right clicking and grabbing content. This is a popular script but it is not foolproof and will not stop the more determined visitors from grabbing images on your site but it may help.

<script language="JavaScript1.1" type="text/javascript">
<!--

function right(e) {
var msg = "Sorry, you don't have permission to right-click.";
if (navigator.appName == 'Netscape' && e.which == 3) {
alert(msg); // Delete this line to disable but not alert user
return false;
}
else
if (navigator.appName == 'Microsoft Internet Explorer' && event.button==2) {
alert(msg); // Delete this line to disable but not alert user
return false;
}
return true;
}
document.onmousedown = right;
//-->
</script>