`.unbind()` is deprecated and you should use the `.off()` method instead. Simply call `.off()` right before you call `.on()`.
This will remove all event handlers:
$(element).off().on('click', function() { // function body });
To only remove registered 'click' event handlers:
$(element).off('click').on('click', function() { // function body });

`.unbind()` is deprecated and you should use the [`.off()`](http://api.jquery.com/off/) method instead. Simply call `.off()` right before you call `.on()`.
This will remove all event handlers:
$(element).off().on('click', function() { // function body });
To only remove registered 'click' event handlers:
$(element).off('click').on('click', function() { // function body });