创建10个a标签 点击会弹出相应的序号

var i;
    for (i = 0;i < 10;i++){
        function fn(i) {
            var a = document.createElement('a');
            a.innerHTML = i + '';
            a.addEventListener('click',function (e) {
                e.preventDefault();
                alert(i);
            });
            document.body.appendChild(a);
        }
        fn(i);
    }