解决getElementsByClassName的兼容性问题 

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>

</head>
<body>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div></div>
</body>
</html>
<script>

    function getElesByClassName(className){
        if(document.getElementsByClassName(className)){ //如果浏览器支持document.getElementsByClassName()方法
            return document.getElementsByClassName(className);
        }else{
            var all=document.getElementsByTagName("*");
            var arr=[];
            for(var i=0;i<all.length;i++){
                if(all[i].className==className){
                    arr.push(all[i]);
                }
            }
            return arr;
        }
    }
    var eles =getElesByClassName("div1");
    alert(eles.length);

</script>

　　

posted on 2015-09-06 19:56  薛将军  阅读(389)  评论(0)    收藏  举报

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