check parent elements, uncheck child

check-uncheck.js

$.fn.checkUncheck = function(options){
	var defaults = {
		onCheck: jQuery.noop,
		onUnCheck: jQuery.noop
	};
		settings = $.extend({}, defaults, options);
	$(this).each(function(){
		var e = $(this);
		e.click(function(){
			if(e[0].checked) {
				checkParent(e.data('parent'));
				settings.onCheck.call(e);
			} else {
				uncheckChild(e.val());
				settings.onUnCheck.call(e);
			}
		})
	})
	var checkParent = function(parentId) {
		var p = $('input[type=checkbox][value='+parentId+']');
		if(0 === p.length) {
			return;
		}
		checkParent(p.data('parent'));
		p[0].checked = true;
		settings.onCheck.call(p);
	},
	uncheckChild = function(parentId) {
		var c = $('input[type=checkbox][data-parent='+parentId+']:checked');
		if(0 === c.length) {
			return;
		}
		c.each(function(){
			var e = $(this);
			uncheckChild(e.val());	
		        e[0].checked = false;
			settings.onUnCheck.call(e);		
		})
	}
}
//Usage
$(document).ready(function(){
	$('input[type=checkbox][data-parent]').checkUncheck({
		onCheck: function() {
			console.log($(this));
		}
	});
})
//Example
http://jsfiddle.net/skowron_line/kepWL/