Защита сайта от копипаста

<script Language="JavaScript">
var message="Забудь о правой кнопке";
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>

<script language="Javascript">
<!--
var message="";
function clickIE() {if (document.all) {(message);return false;}}
function clickNS(e) {if
(document.layers||(document.getElementById&&!document.all)) {
if (e.which==2) {
(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")
-->
</SCRIPT>