JavaScript实现鼠标悬停Tab切换延迟效果

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title></title>
    <script type="text/javascript" src="js/jquery.1.11.3.min.js"></script>
    <script>
      $(function() {
        var t_li = $(".tab")
        var c_li = $(".tab-content div")
        t_li.hover(function() {
          var i = t_li.index($(this));

          function way() {
            t_li.removeClass("cur").eq(i).addClass("cur");
            c_li.hide().eq(i).show();
          }
          timer = setTimeout(way, 500);
        }, function() {
          clearTimeout(timer);
        });
      });
    </script>
    <style>
      .head {
        width: 300px;
        height: 50px;
        border: 1px dashed #ccc;
      }
      
      .tab {
        width: 50%;
        float: left;
        line-height: 50px;
        cursor: pointer;
      }
      
      .cur {
        border-bottom: 2px solid red;
      }
    </style>
  </head>
  <body>
    <div style="width: 300px;margin-left: 300px;" class="main">
      <div class="head">
        <div class="tab cur">tab1</div>
        <div class="tab">tab2</div>
      </div>
      <div class="tab-content">
        <div>tab1的内容<br>tab1的内容<br>tab1的内容<br></div>
        <div style="display: none;">tab2的内容<br>tab2的内容<br>tab2的内容<br></div>
      </div>
    </div>
  </body>

</html>