监听radio点击事件

<label class="radio-pretty inline checked"> <input class="radioItem"
type="radio" checked="checked" name="radio" value="1"><span>按用车日期查询</span>
</label> <label class="radio-pretty inline"> <input class="radioItem"
type="radio" name="radio" value="2"><span>按租车标记日期查询</span>
</label>

$(".radioItem").change(
function() {
var id = $("input[name='radio']:checked").val();
if (id == 1) {
$("#sign").val("Y");
}else if (id == 2){
$("#sign").val("N");
}
});