<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>JS 組件</title>
<style>
.TabControl{
 position:absolute;
}
.TabControl .tab-head{
 height:22px;width:100%;
/* border-left: solid 0px #e0e0e0;border-right: solid 0px #e0e0e0;border-top: solid 0px #e0e0e0;border-bottom: solid 1px #e0e0e0; */
 position:absolute;
 z-index:9;
}
.TabControl ul{
 position:absolute;
 top:2px;
 padding:0px;
 margin:0px;
 z-index:10;
}
.TabControl li{
 list-style:none; /* 將默認(rèn)的列表符號(hào)去掉 */
 padding-left:10px; padding-right:10px;
 margin:0; 
 float:left;
 border: solid 1px #e0e0e0;
 background-color:#ffffff;
 height:20px;
 cursor:default;
}
.TabControl li.selected{
 border-bottom: solid 1px #ffffff;border-top: solid 1px #ff0000;
 z-index:10;
}
.TabControl li.unselected{
 border-bottom: solid 1px #e0e0e0;border-top: solid 1px #e0e0e0;
 z-index:10;
}
.TabControl .pageSelected{
 position:absolute;
 display:block;
 border: solid 1px #e0e0e0; 
 width:100%;height:100%;
 z-index:1;
 top:23px;
}
.TabControl .pageUnSelected{
 display:none;
 border: solid 1px #e0e0e0; 
 width:100%;height:100%;
 z-index:1;
 top:23px;
}
</style>
</head>
<body>
<script lang="javascript">
 var TabControl = function(width, height){
  var me = this;
  //TAB控件容器，頭，列表
  var cbody,tabHead, ul;
  //最后選中的TAB頁(yè)
  var lastSelectedPage = 0;
  //TAB頁(yè)管理容器
  var pages = [];
  /**
   * 初始化函數(shù)
   * param{tabCount}, 創(chuàng)建tab頁(yè)的個(gè)數(shù)
   */
  me.init = function(tabCount){
   //創(chuàng)建TAB容器
   cbody = document.createElement("DIV");
   cbody.className = "TabControl";
   cbody.style.width = width || "400px";
   cbody.style.height = height || "300px";
   //創(chuàng)建TAB控件頭
   tabHead= document.createElement("DIV");
   tabHead.className = "tab-head";
   cbody.appendChild(tabHead);
   //創(chuàng)建TAB頭
   ul = document.createElement("UL");
   tabHead.appendChild(ul);
   //根據(jù)參數(shù)初始化TAB頁(yè)，缺省創(chuàng)建2個(gè)TAB頁(yè)
   var tc = tabCount || 2;
   for(var i=0;i<tc;i++){
    me.insertPage(i,"tabPage" + i) 
   }
   //缺省選中第一頁(yè)
   me.selectPage(0); 
  }
  /**
   * 插入TAB頁(yè)
   * param{idx},插入位置
   * param{title},TAB頁(yè)標(biāo)題
   *
   */
  me.insertPage = function(idx,title){
   if(parseInt(idx)>=0){
     var li = document.createElement("LI");
     li.className = "unselected";
     li.innerText = title;
     var chd = ul.childNodes[idx];
     ul.insertBefore(li);
     li.onclick = function(){
      me.selectPage(getSelectedIndex(li));
     }
     //創(chuàng)建page
     var page = document.createElement("DIV");
     page.className = "pageUnSelected";
     pages.push(page);
     cbody.appendChild(page);
    }
  }
  /*
   * 內(nèi)部函數(shù)
   * 根據(jù)選中的對(duì)象，獲取對(duì)應(yīng)的TAB頁(yè)索引
   */
  function getSelectedIndex(li){
   var chd = ul.childNodes;
   for(var i=0;i<chd.length;i++){
    if(chd[i] == li){
     return i;
    }
   }
  }
  /**
   * 選中某頁(yè)
   * param{idx},選中頁(yè)的索引
   */
  me.selectPage = function(idx){
   if(parseInt(idx)>=0){
    var lis = ul.childNodes;
    alert(lastSelectedPage + ',' + idx);
    lis[lastSelectedPage].className = "unselected";
    lis[idx].className = "selected";
/*
    for(var i=0;i<lis.length;i++){
     if( i== idx){
      lis[i].className = "selected";
     } else{
      alert('B:'+ i + ',' + lis[idx].innerText);
      lis[i].className = "unselected";
     }
    }
*/
    //隱藏?zé)o需顯示的TAB頁(yè)，顯示選中的TAB頁(yè)
    pages[lastSelectedPage].className = "pageUnSelected";
    pages[idx].className = "pageSelected";
    lastSelectedPage = idx;
   }
  }
  //在函數(shù)尾部調(diào)用初始化函數(shù)執(zhí)行初始化
  me.init();
  //最后返回DOM對(duì)象
  return cbody;
 }
 var tabControl = new TabControl();
 document.body.appendChild(tabControl);
</script>
</body>
</html>

最終效果如圖：