Disable right click context menu cut, copy, paste

<script type="text/javascript">
var message="Function Disabled!";
function clickIE4(){
if (event.button==2){
alert(message);
return false;
}
}
function clickNS4(e){
if (document.layers||document.getElementById&&!document.all){
if (e.which==2||e.which==3){
alert(message);
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(message);return false")
</script>

This Will Work.I have tested In: Internet Explorer, Mozilla Firefox, Google Chrome.

No matter what you do, you can't prevent users from having full access to every bit of data on your website. Any Javascript you code can be rendered moot by simply turning off Javascript on the browser (or using a plugin like NoScript).