1 <h1>图片点击切换</h1>
2     <ul id="imagegallery">
3         <li><a href="images/654.jpg" title="图片一说明">图片一</a></li>
4         <li><a href="images/contentimg.jpg" title="图片二说明">图片二</a></li>
5         <li><a href="images/tuku.jpg" title="图片三说明">图片三</a></li>
6     </ul>
7     <img src="data:images/toutiao3.jpg" alt="占位图" id="img">
8     <p id="description">图片说明</p>

 1  function showpic(winpic){
 2             if(!document.getElementById('img')) return false;
 3             var source = winpic.getAttribute('href');
 4             var oImg = document.getElementById('img');
 5             if(oImg.nodeName !='IMG') return false;
 6             oImg.setAttribute('src',source);
 7             if(document.getElementById('description')){
 8                 var description = document.getElementById('description');
 9                 var text = winpic.getAttribute('title');
10                 description.firstChild.nodeValue = text;
11                 //description.innerHTML = text;
12             }
13             return true;
14         }
15
16         function prepareGallery(){
17             if(!document.getElementsByTagName) return false;
18             if(!document.getElementById) return false;
19             if(!document.getElementById('imagegallery')) return false;
20             var gallery = document.getElementById('imagegallery');
21             var links = gallery.getElementsByTagName('a');
22             for(var i=0;i<links.length;i++){
23                 links[i].onclick = function(){
24                    //return showpic(this) ? return : false;
25                    showpic(this);
26                    return false;
27                 }
28             }
29         }
30
31         prepareGallery();