jquery - show textbox when checkbox checked

Question

I have this form

Answer 1

Put a div across your checkbox and text box

and replace your jquery code with this one below,

jQuery(document).ready(function($) {
   $('input.maxtickets_enable_cb').change(function(){
       if ($(this).is(':checked')) $(this).parent().children('div.max_tickets').show();
       else $(this).parent().children('div.max_tickets').hide();
   }).change();
});

I have tested it and it works.