机顶盒 js控制div显示和隐藏

<script type="text/javascript" language="javascript">

    function dis(id){
        var traget = document.getElementById(id);
         if(traget.style.display=="none"){
                 traget.style.display="block";
         }else{
                 traget.style.display="none";
       }
    }
</script>