1 window.onload = function(){
 2     /*轮播图*/
 3     //自动加载
 4     s = setInterval(down,2000);
 5 }
 6 /*控制轮播图的定时器*/
 7 //定义一个变量作为数组下标
 8 var lbnum = 0;
 9 function down(yyNum){
10     //定义一个图片路径数组
11     var lbimgArr = ['../resoures/images/shouye/24401108web1.png','../resoures/images/shouye/2440_1.png','../resoures/images/shouye/412pcshoujiao244011081.png'];
12     //找到图片所在的div
13     var bann = document.getElementById('banner');
14     //找到小圆圈存为数组
15     var yArr = document.getElementsByClassName('xyy');
16     //自动给小圆圈设置样式
17     for(var i = 0;i < yArr.length; i++){
18         yArr[i].style.backgroundPosition = '0px 0px';
19     }
20     if(yyNum == 0 || yyNum == 1 || yyNum == 2){
21         lbStop();
22         yArr[yyNum].style.backgroundPosition = '0px -18px';
23         bann.setAttribute('src',lbimgArr[yyNum]);
24     }else{
25         yArr[lbnum].style.backgroundPosition = '0px -18px';
26         bann.setAttribute('src',lbimgArr[lbnum]);
27         lbnum++;
28         if(lbnum == lbimgArr.length){
29             lbnum = 0;
30         }
31     }
32 }
33 //开始定时器
34 function lbStart(){
35     s = setInterval(down,2000);
36 }
37 //停止定时器
38 function lbStop(){
39     clearInterval(s);
40 }

 1 function appOut(overNum){    //根据情况，可给事件传参
 2     function isMouseLeaveOrEnter(e, handler) {
 3         var reltg=e.relatedTarget?e.relatedTarget:e.type=='mouseout'?e.toElement:e.fromElement;
 4             while (reltg && reltg != handler){
 5              reltg = reltg.parentNode;
 6             }
 7         return (reltg != handler);
 8         }
 9         //找到默认显示的div
10         var div1 = document.getElementsByClassName('onMover')[overNum];
11         //找到默认隐藏的div
12         var div2 = document.getElementsByClassName('divb_t')[overNum];
13         div2.οnmοuseοut=function(ev){
14         var ev=ev||window.event;
15         if(!isMouseLeaveOrEnter(ev,div2)){
16           return false;
17         }
18         div2.style.height = '310px';
19         div2.style.display = 'none';
20         div1.style.opacity = '1';
21         }
22 }