Disable Right Click in SharePoint 2015

<script language=”javascript”>

function Disable_Control_C() {
var keystroke = String.fromCharCode(event.keyCode).toLowerCase();

if (event.ctrlKey && (keystroke == ‘c’ || keystroke == ‘v’)) {
alert(“Duplication of data is not allowed!”);
event.returnValue = false; // disable Ctrl+C;
document.addEventListener(“keydown”, function(e) {
if (e.keyCode == 83 && (navigator.platform.match(“Mac”) ? e.metaKey : e.ctrlKey)) {
e.preventDefault();
alert(‘captured’);
}
}, false);
window.addEventListener(“dragover”,function(e){
e = e || event;
e.preventDefault();
},false);
window.addEventListener(“drop”,function(e){
e = e || event;
e.preventDefault();
},false);

</script>