html
<ul class="span8"> <input type="radio" name="insu_type" class="insu_type" value="1"><span>寿险</span> <input type="radio" name="insu_type" class="insu_type" value="2"><span>财险</span> </ul>
js取值
var insu_type = $('input:radio[name="insu_type"]:checked').val();