1<input class="coupon_question" type="checkbox" name="coupon_question" value="1" onchange="valueChanged()"/>
2
3<script type="text/javascript">
4 function valueChanged()
5 {
6 if($('.coupon_question').is(":checked"))
7 $(".answer").show();
8 else
9 $(".answer").hide();
10 }
11</script>