Question

How to undelegate this, and how to re-delegate (on/off)… Without affect the other event handlers in ‘a’.

$(document).ready( function() {
    $('document').delegate( 'a', 'click' function(){return false;} ); 
});

Answer 1

Do something like this, I’m using the click.myEvent to create my own namespace within the click event, so this way it will only be .myEvent events that get generated and removed.

Deletate

$(document).ready( function() {
    $('document').delegate( 'a', 'click.myEvent', function(){return false;} ); 
});

Undelegate:

$(document).ready( function() {
    $('document').undelegate( 'a', 'click.myEvent' ); 
});