Show and hide dom elements when checkboxes or radios are selected.
Info:
Since I'm having a hard time naming and concisely describing this
<label for="good_day">
<input type="checkbox" id="good_day" />
Are you having a good day?
</label>
<div id="show_good_day_more">
<label for="good_day_more">Please tell us more</label>
<input id="good_day_more" />
</div>
$('#good_day').toggle_input_container('#show_good_day_more');