JavaScript 图片库中的下一个和上一个链接不起作用

Question

我需要在同一页面上有多个画廊（带有标题），并且一直在尝试实现这个 javascript，但我无法获得下一个 |以前为任一画廊工作的链接。 javascript 新手 - 有什么建议吗？

这里是小提琴：http://jsfiddle.net/astHh/11/

HTML：

<div style="text-align: center">
  <!--  Place the first image here  -->
  <img src="http://www.cool-smileys.com/images/out11.jpg" id="mypic" name="mypic" alt="information" border="0" height="150" width="200">
  <br>
  <!--  Place the text for the first image here  --><div id="burns">Caption one</div>
  <p>
  <a href="#" onclick="S2.UpDown(-1); return false;">&laquo; Previous</a> |
  <a href="#" onclick="S2.UpDown(1); return false;"> Next &raquo;</a>
</div>

<p>

<div style="text-align: center">
  <!--  Place the first image here  -->
  <img src="http://www.cool-smileys.com/images/out13.jpg" id="mypic2" name="mypic2" alt="information" border="0" height="150" width="200">
  <br>
  <!--  Place the text for the first image here  --> <div id="burns2">Caption two</div>
  <p>
  <a href="#" onclick="S2.UpDown(-1); return false;">&laquo; Previous</a> |
  <a href="#" onclick="S2.UpDown(1); return false;"> Next &raquo;</a>
</div>

Javascript：

<script type="text/javascript">


function SimpleSlideShow(o){
 this.img=document.getElementById(o.ImageID);
 this.txt=document.getElementById(o.TextID);
 this.ary=o.Array||[];
 this.cnt=0;
}

SimpleSlideShow.prototype.UpDown=function(ud){
  this.cnt+=ud;
  this.cnt=this.cnt<0?this.ary.length-1:this.cnt==this.ary.length?0:this.cnt;
  if (this.ary[this.cnt]){
   if (this.img&&this.ary[this.cnt][0]){
    this.img.src=this.ary[this.cnt][0];
    this.img.alt=this.ary[this.cnt][1];
   }
   if (this.txt){
    this.txt.innerHTML=this.ary[this.cnt][2]||'';
   }
  }
 }

S1=new SimpleSlideShow({
 ImageID:'mypic',
 TextID:'burns',
 Array:[
  ['http://www.cool-smileys.com/images/out11.jpg,' 'Caption one', 'The beautiful mountains'],
  ['http://www.cool-smileys.com/images/out10.jpg','Caption two','The crystal clear lake'],

]
});

S2=new SimpleSlideShow({
 ImageID:'mypic2',
 TextID:'burns2',
 Array:[
  ['http://www.cool-smileys.com/images/out13.jpg','caption one', 'The beautiful mountains'],
  ['http://www.cool-smileys.com/images/out12.jpg','caption two','The lonesome, barren tree']
]
});


</script>

Answer 1

您的 javascript 中有多个语法错误：

从脚本窗格中删除：

<script type="text/javascript">

</script>

在您对“S1”的定义中，您缺少一个逗号（就在“Caption one”之前）：

S1=new SimpleSlideShow({
    ImageID:'mypic',
    TextID:'burns',
    Array:[
        ['http://www.cool-smileys.com/images/out11.jpg,','Caption one', 'The beautiful mountains'],
        ['http://www.cool-smileys.com/images/out10.jpg','Caption two','The crystal clear lake'],
    ]
});

然后在 HTML 窗格中，您应该将第一组 prev/next 链接更新为目标 S1 而不是 S2。

更新小提琴：http://jsfiddle.net/astHh/12/