以下是 随机显示图片代码 的示例演示效果:
部分效果截图:

HTML代码(index.html):
<html>
<head>
<meta name="keywords" content="JS代码,图片特效,JS广告代码,JS特效代码" />
<meta name="description" content="此代码内容为随机显示图片代码,属于站长常用代码" />
<title>随机显示图片代码</title>
</head>
<body>
<script language="JavaScript"> 
var how_many_ads = 5 
var now = new Date() 
var sec = now.getSeconds() 
var ad = sec % how_many_ads; 
ad +=1; 
 
if (ad==1){ 
url="#"; 
alt="ad1";  
banner="images/01.jpg"; 
width="440"; 
height="230"; 
} 
if (ad==2) {   
url="#"; 
alt="ad2";  
banner="images/02.jpg";  
width="440"; 
height="230"; 
} 
  
if (ad==3) { 
url="#"; 
alt="ad3"; 
banner="images/03.jpg"; 
width="440"; 
height="230"; 
}
if (ad==4) { 
url="#"; 
alt="ad4"; 
banner="images/04.jpg"; 
width="440"; 
height="230"; 
}  
if (ad==5) { 
url="#"; 
alt="ad5"; 
banner="images/05.jpg"; 
width="440"; 
height="230"; 
}  
  
document.write('<center>'); 
document.write('<a href=\"' + url + '\" target=\"_blank\">'); 
document.write('<img src=\"' + banner + '\" width=') 
document.write(width + ' height=' + height + ' '); 
document.write('alt=\"' + alt + '\" border=0></a><br>'); 
document.write('</center>'); 
</script>
  <br>
  <br>
</body>
</html>
 
             
        