jQuery实现 RadioButton做必选校验功能

<div class="col-xs-4 col-sm-4 col-md-4"> 
   <div class="radio col-mr-20"> 
     @Html.RadioButtonFor(m => m.Materielcategory, "电子物料", new { data_label = "电子物料", name = "Materielcategory", @readonly = "readonly" }) 
   </div> 
   <div class="radio col-mr-20"> 
     @Html.RadioButtonFor(m => m.Materielcategory, "其他", new { data_label = "其他", name = "Materielcategory", @readonly = "readonly" }) 
   </div> 
</div> 

//物料分类做必选校验 
    function TongyiBefore() { 
      var Materielcategory = $(":radio[name=Materielcategory]:checked").val(); 
      if (Materielcategory == null) { 
        layer.alert("请先选择物料分类！", { icon: 7 }); 
        return; 
      } 
         
    }