Just a little snippet I worked up that may be useful to someone …
jQuery(document).ready(function($){
$('div#checkall-wrapper input[type=checkbox]').click(function(){
if( $(this).attr('checked') ){
$('tdiv#wraparound-targets input[type=checkbox]').attr('checked','checked');
}else{
$('div#wraparound-targets input[type=checkbox]').removeAttr('checked');
}
});
});
Make sense?
