cbFamily

Checkbox group (parent/children) functionality. Makes a checkbox parent of other checkboxes.

• If the parent is clicked the children are checked/unchecked based on the parent.
• If all the children are checked, parent gets checked too.
• If there is an unchecked item in the children and if the parent is checked, it gets unchecked.
• children can be a function. In this case, that function is run agaist the parent in order to find the children. This is useful for groups of checkboxes.
• Checks/unchecks parent based on the initial status of its children at start.

Example group usage:

    $(".titles input:checkbox").cbFamily(function (){         return $(this).parents("div:first").next().find("input:checkbox");     }); 

Try a Demo

Based and improved on http://tech.tiffanyandjeremy.com/Articles/Two-level-JQuery-check-and-uncheck-all-child-checkboxes-of-a-parent-checkbox