220088 - web page can override context-menus and other browser functions

Status: VERIFIED DUPLICATE of bug 86193

(Core :: DOM: UI Events & Focus Handling, defect)

Description

[Jeremy M. Dolan]

Sample book pages on Amazon.com have JS which tries to nullify right-clicks, I
suppose to make life difficult for people who want to save an image.

Context menus are a application function and a web page should not be allowed to
override them. If it is a requirement of JS to allow right-clicks to be tied to
other actions, ctrl+click needs to be implemented to always perform the default
action.

The offending JS:

function noRightClick(e) {
if (document.layers || document.getElementById && !document.all) {
if (e.which == 2 || e.which == 3) {
document.captureEvents(Event.MOUSEDOWN);
return false;
}
} else if (document.all && !document.getElementById) {
if (event.button == 2)
return false;
}
}
function noContextMenu () {
return false;
}
document.onmousedown = noRightClick;
document.oncontextmenu = noContextMenu;

Comment 1

[Jeremy M. Dolan]

*** Bug 220087 has been marked as a duplicate of this bug. ***

Comment 2

[Bill Mason]

*** This bug has been marked as a duplicate of 86193 ***

Comment 3

[Daniel Wang]

v