data-*属性的使用

<div id="main" data-id="1" data-url="ani.html" data-index="1">data-*属性</div>
<a href="dom_obj_attributes.php" target="_blank">Attr 对象</a>

    var a = document.getElementById("main").getAttribute("data-index");
    console.log(a);
    var b = document.getElementsByTagName("a")[0].getAttribute("href");
    console.log(b);
    var c = $("#main").attr("data-url","lockdatav.cn").attr("data-url");
    console.log(c);