js改变classname 或添加classname （转）

<style type="text/css">
.newDiv {
    font-weight: bold;
}
</style>

<script>
function clk(event) {
    var parent = document.getElementByIdx_x("parent");
   // parent.className = parent.className + " newDiv";  //添加classname

   parent.className = " newDiv";  //改变classname

}
</script>

</head>
<body>
<input type="button" value="click" onclick="clk(event);"/>
<div id="parent" class="google">
    <div >child</div>
</div>

</body>

posted @ 2016-04-21 13:47  腾云丶  阅读(1389)  评论(0)    收藏  举报