https://tiltuesday.net/dwnorightclick.js

1//Prevent users from right clicking on a web page
2// Capture the MOUSEDOWN event
3
4if (document.layers) {document.captureEvents(Event.MOUSEDOWN)} 	//Netscape
5document.onmousedown=trapClick							//MS Explorer
6
7function trapClick(ev) {
8//Mouse click event handler
9	var strMsg='All original photography Copyright 2005 By David Weinstein. Please contact David for more information.'
10	
11	if (document.all) {			//MS Explorer test for right button
12		if (event.button == 2) {
13			alert(strMsg)
14			return false
15			}
16		}
17	
18	if (document.layers) {		//Netscape test for right button
19		if (ev.which == 3) {
20			alert(strMsg)
21			return false
22			}
23		}
24	}
25