mingsu_的博客

var arr=new Array(); arr[0]="新的一天开始啦"; arr[1]="有没有想我哦"; arr[2]="宝宝天天开心~"; arr[3]="今天也超级想你!"; var n=arr.length; //获取数组长度 var ran = Math.floor(Math.rando...

var cars = ["BMW", "Volvo", "Saab", "Ford"];var i = 0;var text = "";for (;cars[i];) { text += cars[i] + "<br>"; i++;} for的第一个和第三个参数可以为空第二个参数可以放数组变量,为空的时候会跳出循环...

function changeHtml(){ var lastname="Bill",lastName="Gates"; var printAll="change the time " + lastname+ " " + lastName; document.getElementById("firstp").innerHTML=printAll; console.log...