CSS+JS实现可控的文字列表上下滚动效果

2016-08-07 网页编程网 网页编程网

<html>
<head>
<title>CSS+JS实现可控的文字列表上下滚动效果</title>
<style>
    body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, form, fieldset, input, p, blockquote, th, td {margin:0;padding:0; font-size:12px;}
    li{ list-style:none;}
    ul{ margin:0;}
    a{ color:#0066CC; text-decoration:none;}
    a:hover{ color:#FF0000; text-decoration: underline;}
    .breakNewsblock {
    margin:0 auto;
    position:relative;
    width:276px;
    overflow:hidden;
    }
    .breakNewsblock h2 {
    background:transparent url(/imagesforcode/201206/icon2.gif) no-repeat scroll 7px -307px;
    color:#8F1D21;
    float:left;
    font-size:12px;
    padding-left:25px;
    }
    .breakNewsblock h2 span{ float:right; padding-right:10px;}
    #breakNews {
    background:transparent url(/imagesforcode/201206/backbar.gif) no-repeat scroll center top;float:left;height:138px;
    margin-top:5px;
    padding:0 0 3px 2px;
    width:275px;
    }
    #breakNews .list6 {color:#333333;float:left;height:115px;margin-top:11px;overflow:hidden;width:240px; padding-left:10px;
    }
    #breakNews .list6 li{ padding:3px 0;}
    #breakNews .hit {float:right;height:24px; margin-top:23px; width:17px;}
    #breakNews .hit span { display:block;float:left;height:13px; margin-bottom:6px;width:13px;}
    </style>
<script language="javascript" type="text/javascript">
function ScrollText(content,btnPrevious,btnNext,autoStart,timeout,isSmoothScroll)
{
    this.Speed = 10;
    this.Timeout = timeout;
 this.stopscroll =false;//是否停止滚动的标志位
 this.isSmoothScroll= isSmoothScroll;//是否平滑连续滚动
    this.LineHeight = 20;//默认高度。可以在外部根据需要设置
    this.NextButton = this.$(btnNext);
    this.PreviousButton = this.$(btnPrevious);
    this.ScrollContent = this.$(content);
    this.ScrollContent.innerHTML += this.ScrollContent.innerHTML;//为了平滑滚动再加一遍

if(this.PreviousButton)

{
  this.PreviousButton.onclick = this.GetFunction(this,"Previous"); 
  this.PreviousButton.onmouseover = this.GetFunction(this,"MouseOver");
  this.PreviousButton.onmouseout = this.GetFunction(this,"MouseOut");
 }
 if(this.NextButton){
  this.NextButton.onclick = this.GetFunction(this,"Next");
  this.NextButton.onmouseover = this.GetFunction(this,"MouseOver");
  this.NextButton.onmouseout = this.GetFunction(this,"MouseOut");
    }
    this.ScrollContent.onmouseover = this.GetFunction(this,"MouseOver");
    this.ScrollContent.onmouseout = this.GetFunction(this,"MouseOut");

if(autoStart)
    {
        this.Start();
    }
}

ScrollText.prototype = {

$:function(element)
 {
  return document.getElementById(element);
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 Previous:function()
 {
  this.stopscroll = true;
  this.Scroll("up");
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 Next:function()
 {
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  this.Scroll("down");
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   this.AutoScrollTimer = setInterval(this.GetFunction(this,"SmoothScroll"), this.Timeout);
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 Stop:function()
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 MouseOver:function(){ 
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 MouseOut:function(){
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  }else{
   if(parseInt(this.ScrollContent.scrollTop) >= parseInt(this.ScrollContent.scrollHeight) / 2)
   {
    this.ScrollContent.scrollTop = 0;
   }
   clearTimeout(this.ScrollTimer);
   //this.AutoScrollTimer = setTimeout(this.GetFunction(this,"AutoScroll"), this.Timeout);
  }
 },
 SmoothScroll:function(){
  if(this.stopscroll){
   return;
  }
  this.ScrollContent.scrollTop++;
  if(parseInt(this.ScrollContent.scrollTop) >= parseInt(this.ScrollContent.scrollHeight) / 2){
   this.ScrollContent.scrollTop = 0;
  }
 },
 Scroll:function(direction){

if(direction=="up"){
   this.ScrollContent.scrollTop--;
  }
  else{
   this.ScrollContent.scrollTop++;
  }
  if(parseInt(this.ScrollContent.scrollTop) >= parseInt(this.ScrollContent.scrollHeight) / 2)
  {
   this.ScrollContent.scrollTop = 0;
  }
  else if(parseInt(this.ScrollContent.scrollTop)<=0)
  {
   this.ScrollContent.scrollTop = parseInt(this.ScrollContent.scrollHeight) / 2;
  }
  
  if(parseInt(this.ScrollContent.scrollTop) % this.LineHeight != 0)
  {
   this.ScrollTimer = setTimeout(this.GetFunction(this,"Scroll",direction), this.Speed);
  }
 },
 GetFunction:function(variable,method,param){
  return function(){
   variable[method](param);
  }
 }
}

function ignoreError() {
  return true;
}
window.onerror = ignoreError; 
</script>
    </head>
    <body>
    <div class="breakNewsblock">
    <h2><a target="_blank" href="#">即时新闻</a></h2>
    <div id="breakNews">
    <ul id="breakNewsList" class="list6">
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<li><a href="#" target="_blank">JavaScript 列出每个星期7天的具体日期</a></li>
    </ul>
    <div class="hit">
    <span><a style="cursor: pointer;"><img width="11" height="10" id="pre2" alt="上一条" src="/imagesforcode/201206/none.gif"/></a></span>
    <span><a style="cursor: pointer;"><img width="11" height="10" id="next2" alt="下一条" src="/imagesforcode/201206/none.gif"/></a></span>
    </div>
    </div>
    </div>
<script language="javascript" type="text/javascript">
var scroll2 = new ScrollText("breakNewsList","pre2","next2",true,70,true);
scroll2.LineHeight = 24;
</script>
</body>
</html>

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