php 显示随机图片的JS代码

var teacherImgSrc = new Array();//图片地址
var teacherIntro = new Array();//图片链接

teacherImgSrc[0] = “0.gif”;
teacherIntro[0] = “”;

teacherImgSrc[1] = “1.gif”;
teacherIntro[1] = “”;

teacherImgSrc[2] = “2.gif”;
teacherIntro[2] = “”;
var teacherNumber = Math.floor(Math.random()*teacherImgSrc.length);//随机函数

document.write(“<img src='”+teacherImgSrc[teacherNumber]+”‘ />”+teacherIntro[teacherNumber] );