checkbox check all option

Question

I have checkbox set with Category Subcategorywise...

Company
    Microsoft
    Apple

 Country
     USA
     UK

and checkbox attached to e

Answer 1

See simple demo here: http://jsfiddle.net/Pfmuq/2/ or simpler: http://jsfiddle.net/Pfmuq/3/

Please note id should always be unique at all times, rest when you will read the code I have noticed a pattern in your parent and Sub naming hence I took that under account.

please note I also took liberty to switch over your id and class anyhoo code is below :)

Rest hope this helps, :)

code

$('input[name="Company"],input[name="Country"]').click(function(){
    if ($(this).is(':checked')){
          $(this).nextAll('input[name="'+this.name+'Sub"]').prop('checked',true);

    } else {
          $(this).nextAll('input[name="'+this.name+'Sub"]').prop('checked',false);   
    }
});
​

code from 2nd demo

$('input[name="Company"],input[name="Country"]').click(function(){
          $(this).nextAll('input[name="'+this.name+'Sub"]').prop('checked',this.checked);
});
​

HTML

Company
 Microsoft
 Apple

 
Country
 USA
 UK​​​