Disabling Right Clicks

I saw quite a few scripts that allow the user to disable the right-click on certain components (usually images). This is what the code looked like (for IE);

function disableRightClick() {
if (event.button == 2) {
alert("Sorry, right-click is disabled");
return false;
}}

Then call this function like so:

<a href="test.html" >

I would like to disable right-clicks without the annoying alert.
I just don't want the menu to open when the user right-clicks the link.
Is that possible? When I remove the call to alert, then the code has no effect.