JavaScript

    var re = document.getElementById("fonts");

    var res =re.getElementsByTagName("p");

        console.log(res);

        // 利用闭包闪现传参，延时

        for(var i=0; i<res.length; i++){    

            setTimeout((function(i){

                return function(){

                    res[i].style.opacity=1;

                }

            })(i),i*2000);

        }   

创建多个定时器，传入参数