Jquery “select all” checkbox

Question

I am trying to select all checkboxes on a page once the \'select all\' checkbox is clicked and i am using jquery for this as you can see at the below link:

http://js

Answer 1

Assume parent checkbox has a class of mainselect and all child have class of childselect

Then selecting parent will select all checkbox and vice-versa with the code below:

$('#mainselect').live('change',function(){
if($(this).attr('checked') == 'checked') {
    $('.childselect').attr('checked','checked');
} else {
    $('.childselect').removeAttr('checked');
}
});