jQuery 'deepest' plugin

jquery.deepest.js

$.fn.deepest = function() {
	/// <summary>
	///   Return the deepest child of this element.
	///		For example, when run on this structure:
	///		
	///		<div>
	///		  <span> <b>pick me!</b> </span>
	///		  <span> </span>
	///		</div>
	///		
	///		It would return the element:
	///		
	///		<b>pick me!</b>
	/// </summary>
	var levels = 0;
	var deepest;

	$(this).find('*').each(function() {
		if( !this.firstChild || this.firstChild.nodeType !== 1 ) {
			var levelsFromThis = $(this).parentsUntil(this).length;
			if(levelsFromThis > levels) {
				levels = levelsFromThis;
				deepest = this;
			}
		}
	});
	return $(deepest);
};

This plugin seems to be more complex and has a little more functionality: https://github.com/martinille/jquery.deepest.js