Disable Klik kanan

<script>
var pesen="Tidak Diizinkan Klik Kanan Untuk Copy Paste !!!";
///////////////////////////////////
function clickIE4(){if (event.button==2){alert(pesen);return false;}}
function clickNS4(e){if (document.layers||document.getElementById&&!document.all){if (e.which==2||e.which==3){alert(pesen);return false;}}}
if (document.layers){document.captureEvents(Event.MOUSEDOWN);document.onmousedown=clickNS4;}
else if (document.all&&!document.getElementById){document.onmousedown=clickIE4;}
document.oncontextmenu=new Function("alert(pesen);return false")
</script>