This is one that I use. It has no warning pop-up window. It simply prevents them from right clicking on a page.

This is one that I use. It has no warning pop-up window. It simply prevents them from right clicking on a page.
Code:
//Disable right click script
//no alert

var message="";
///////////////////////////////////
function clickIE() {if (document.all) {(message);return false;}}
function clickNS(e) {if
(document.layers||(document.getElementById&&!document.all)) {
if (e.which==2||e.which==3) {(message);return false;}}}
if (document.layers)
{document.captureEvents(Event.MOUSEDOWN);document.onmousedown=clickNS;}
else{document.onmouseup=clickNS;document.oncontextmenu=clickIE;}

document.oncontextmenu=new Function("return false")
This doesn't stop anyone who knows enough, but it will frustrate the newbies!