下拉导航

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<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>下拉导航</title>
  <style>
    a{
      text-decoration: none;
    }
    #pullDownNavigation .navigation{
      position: relative;
      float: left;
      border: #cc2123 solid 1px;
      width: 19%;
      height: 30px;
      text-align: center;
    }
    .pullDownNavigationc{
      position: relative;
      float: left;
      top: -1px;
      overflow: hidden;
      height: 80px;
      text-align: center;
      width: 100%;
      border: #cc2123 solid 1px;
      border-top: 0;
      display: none;
    }

    .navigation .nav{
      height: 32px;
      line-height: 30px;
    }
  </style>
</head>
<body>
  <div id="pullDownNavigation">
    <div class="navigation navigation1" data-targetID='pullDownNavigation1'>
      <div class="nav"><a href="#" target="_blank">导航一</a></div>
      <div class="pullDownNavigationc" id="pullDownNavigation1">
        <div><a href="#" target="_blank">下拉菜单1</a></div>
        <div><a href="#" target="_blank">下拉菜单2</a></div>
        <div><a href="#" target="_blank">下拉菜单3</a></div>
        <div><a href="#" target="_blank">下拉菜单4</a></div>
      </div>
    </div>
    <div class="navigation navigation1" data-targetID='pullDownNavigation2'>
      <div class="nav"><a href="#" target='_blank'>导航二</a></div>
      <div class="pullDownNavigationc" id="pullDownNavigation2">
        <div><a href="#" target="_blank">下拉菜单1</a></div>
        <div><a href="#" target="_blank">下拉菜单2</a></div>
        <div><a href="#" target="_blank">下拉菜单3</a></div>
        <div><a href="#" target="_blank">下拉菜单4</a></div>
      </div>
    </div>
    <div class="navigation navigation1" data-targetID='pullDownNavigation3'>
      <div class="nav"><a href="#" target='_blank'>导航三</a></div>
      <div class="pullDownNavigationc" id="pullDownNavigation3">
        <div><a href="#" target="_blank">下拉菜单1</a></div>
        <div><a href="#" target="_blank">下拉菜单2</a></div>
        <div><a href="#" target="_blank">下拉菜单3</a></div>
        <div><a href="#" target="_blank">下拉菜单4</a></div>
      </div>
    </div>
    <div class="navigation navigation1" data-targetID='pullDownNavigation4'>
      <div class="nav"><a href="#" target='_blank'>导航四</a></div>
      <div class="pullDownNavigationc" id="pullDownNavigation4">
        <div><a href="#" target="_blank">下拉菜单1</a></div>
        <div><a href="#" target="_blank">下拉菜单2</a></div>
        <div><a href="#" target="_blank">下拉菜单3</a></div>
        <div><a href="#" target="_blank">下拉菜单4</a></div>
      </div>
    </div>
  </div>

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         return eArr;
       },
       navs = getTypeElement(document.getElementById('pullDownNavigation').childNodes,"div"),
       i = 0,
       l = navs.length,
       targetID = null;

       for(; i<l; i++){
         navs[i].onmousemove = function () {
           targetID = this.getAttribute("data-targetID");
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         navs[i].onmouseout = function(){
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</body>
</html>
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