JavaScript implements image carousel effects with titles_javascript skills

Image carousels are widely used on some shopping websites. Here is a brief introduction to the implementation of image carousels.

As shown in the picture

CSS code:

 <style type="text/css">
 
.body{
  width:524px;
  border:solid 1px #666;
  margin-left:auto;
  margin-right:auto;
  }
 .bg{
    background-color:#E0E0E0;
    height:20px;
    border-top:solid 1px #B4B4B4;
    }
  .number{
    font-size: 14px;
    font-weight: bold;
    color: #FFF;
    background-color: #9E2E07;
    display: block;
    border: 1px solid #FFF;
    width:18px;
    height:18px;
    text-align: center;
    margin-left:10px;
    cursor:pointer;
    float:left;
    }
  .numberOver{
    color:#8C2806;
    font-size:14px;
    width:280px;
    background-color:#FFF;
    text-align:center;
    float:left;
    display: block;
    margin-left:10px;
    }
.main{
  width:95%;
  margin-left:auto;
  margin-right:auto;
  }
  .left_indent{
    padding-left:20px;
    }
  .red{
    color:#F00;
    }
 </style>

HTML code:

 <div class="body"><img src="/static/imghwm/default1.png"  data-src="ad-01.jpg"  class="lazy"    style="max-width:90%"  style="max-width:90%" border="0" alt="JavaScript implements image carousel effects with titles_javascript skills" id="Rotator">
 <div class="bg">
 <div class="number" id="fig_1" onclick="show(1);">1</div>
 <div class="number" id="fig_2" onclick="show(2);">2</div>
 <div class="number" id="fig_3" onclick="show(3);">3</div>
 <div class="number" id="fig_4" onclick="show(4);">4</div>
 
 </div>
 </div>

JS code:

 <script type="text/javascript">
 // JavaScript Document
//定义全局变量
var title=new Array();
title[0]="1.店庆第一波 限时抢购 一日三疯！";
title[1]="2.十年店庆均价场 39/99/169专场！";
title[2]="3.全场69折封顶 享当当的超值低价！";
title[3]="4.店庆钜献 海量图书69折封顶";

var NowFrame = 1;  //最先显示第一张图片
var MaxFrame = 4;  //一共五张图片
function show(d1) {
  if(Number(d1)){
    clearTimeout(theTimer); //当触动按扭时，清除计时器
    NowFrame=d1;        //设当前显示图片
    }
  for(var i=1;i<(MaxFrame+1);i++){
    if(i==NowFrame){
      
      document.getElementById("Rotator").src ="ad-0"+i+".jpg";  //显示当前图片
      document.getElementById("fig_"+i).innerHTML=title[i-1];    //显示当前图片对应的标题
      document.getElementById("fig_"+i).className="numberOver";  //设置当前标题的CSS样式
     }
     else{
     document.getElementById("fig_"+i).innerHTML=i;
     document.getElementById("fig_"+i).className="number";
     }
  }
  if(NowFrame == MaxFrame){  //设置下一个显示的图片
    NowFrame = 1;
    }
  else{
    NowFrame++;
    }
}
var theTimer=setInterval('show()', 3000);  //设置定时器，显示下一张图片
window.onload=show;  //页面加载时运行函数show()

</script>

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