js通过class来获取DOM对象 

<!DOCTYPE html >
<html>
    <head>
        <meta charset="utf-8" />
        <title>get objects by class</title>
    </head>
    <body >
        <div class="a">1</div>
        <div class="a">2</div>
        <div class="a">3</div>
        <div class="a">4</div>
        <script>
            getObjsByClass("a");
            function  getObjsByClass (param) {
                var tags = tags || document.getElementsByTagName("*");
                var list = [];
                for( var k in tags)
                {
                    var tag = tags[k];
                    if(tag.className == param) {
                        document.write(tag.innerHTML);
                        list.push(tag);
                    }
                }
                return list;
            }
        </script>
    </body>
</html>
posted @ 2012-08-08 10:17  playerlife  阅读(19393)  评论(2)  编辑  收藏  举报