preBind() - Add an event binding *before* any pre-existing bindings. (An early version, may not work in all scenarios)

jquery.prebind.js

$.fn.preBind = function(type, data, fn) {
	var currentBindings = this.data('events')[type];
	var currentBindingsLastIndex = currentBindings.length - 1;
	var newBindings = [];

	// bind the event
	this.bind(type, data, fn);

	// move the new event to the top of the array
	newBindings.push(currentBindings[currentBindingsLastIndex]);
	$.each(currentBindings, function (index) {
		if (index < currentBindingsLastIndex)
			newBindings.push(this);
	});
	this.data('events')[type] = newBindings;

	return this;
};