爱玺玺

 <input type="radio" name="chongdan"  lay-filter="chongdan" value="不重单" title="不重单" checked="">

            <input type="radio" name="chongdan" lay-filter="chongdan" value="重单" title="重单">

<script>

layui.use(['form'], function(){

  var form = layui.form;

  form.on('radio(chongdan)', function(data){

    alert();

  });  

});

</script>