JS配合css实现slide文字框缩放伸展效果

浏览数：47 / 时间：2015年06月09日

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content" content="text/html charset=gb2312">
<title>JS配合css实现slide文字框缩放伸展效果</title>
<style type="text/css">
*{margin:0; padding:0;}
ul{list-style:none;}
.box{width:300px; margin:10px; border:1px solid #ccc; overflow:hidden; position:relative; font-size:12px;}
.oHx{height:30px; background:#eee; line-height:30px; font-size:14px; text-indent:14px; cursor:pointer;}
.fold{position:absolute; top:9px; right:12px;}
.box_content{line-height:18px; overflow:hidden; display:none;}
</style>
<script type="text/javascript">
 function getElementsByClassName(className,id,tag){
    tag = tag || "*";
    if(id){
     var id =  typeof id == "string" ? $(id) : id;
    }else{
     var id = document.body;
    }
    var els = id.getElementsByTagName(tag),arr = [];
    for(var i=0,n=els.length;i<n;i++){
     for(var j=0,k=els[i].className.split(" "),l=k.length;j<l;j++){
      if(k[j]==className){
       arr.push(els[i]);
       break;
      }
     }
    }
    return arr;
   };
   function Slide(slideClass,slideBtn,slideCon,slideSpeed) {
    this.oSlides = getElementsByClassName(slideClass);
    this.oTimer = null;
    this.slideBtn = slideBtn;
    this.slideCon = slideCon;
    this.slideSpeed = slideSpeed;
   }
   Slide.prototype = {
    oTimer:null,
    _init:function (){
     this._slideEvent();
    },
    _slideEvent:function (){
     var This = this;
     for(var i = 0,n=This.oSlides.length;i<n;i++){
      (function(n){
       var oSlide = This.oSlides[n];
       var oSlideBtn = getElementsByClassName(This.slideBtn,oSlide)[0];
       var oSlideCon = getElementsByClassName(This.slideCon,oSlide)[0];
       oSlideBtn.onclick = function (){
        if(oSlideCon.style.display == "block" && This.oTimer == null){
         This._slideClose(oSlideCon);
        }else if(!(oSlideCon.style.display == "block" ) && This.oTimer == null){
         This._slideOpen(oSlideCon);
        }
       }
      })(i)
     }
    },
    _slideOpen:function (slideCon){
     var This = this;
     slideCon.style.display = "block";
     slideCon.style.height = "auto";
     var slideHeight = slideCon.offsetHeight;
     slideCon.style.height = 0 + "px";
     This.oTimer = setInterval(function (){
      if(slideCon.offsetHeight < slideHeight){
       slideCon.style.height = slideCon.offsetHeight + 2 + "px";
      }else{
       clearInterval(This.oTimer);
       This.oTimer = null;
      }
     },This.slideSpeed);
    },
    _slideClose:function (slideCon){
     var This = this;
     This.oTimer = setInterval(function (){
      if(slideCon.offsetHeight <= 0){
       clearInterval(This.oTimer);
       slideCon.style.display = "none";
       This.oTimer = null;
      }else{
       slideCon.style.height =slideCon.offsetHeight - 2 + "px";
      }
     },This.slideSpeed);
    }
   }
  </script>
 </head>
 <body>
  <div class="box">  
   <div class="oHx slide">收缩1</div> 
   <div class="box_content">
    <ul class="uft" style="padding:10px;">  
<li>
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<li>
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  </div>
  <div class="box">  
   <div class="oHx slide">收缩2</div> 
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<li>
<a title="渐变彩色的文字" target="_blank" href="#">
渐变彩色的文字</a></li>
<li>
<a title="指定文字逐条显示" target="_blank" href="#">
指定文字逐条显示</a></li>
<li>
<a title="滚动的标题栏" target="_blank" href="#">
滚动的标题栏</a></li>
    </ul> 
   </div>
  </div>
  <script type="text/javascript">
   var mySlide = new Slide("box","slide","box_content",10); 
   mySlide._slideEvent();
  </script>
 </body>
</html>