基于jQuery仿搜狐辩论投票动画代码

<script type="text/javascript">
      $(document).ready(function () {
          var a = 500;
          var b = 130;
          $("#white").animate({ width: 0, left: "250px" }, 1000, function () {
              $("#vs").fadeIn("slow", function () {
                  $("#all").html(a + b); $("#aa").html(a); $("#bb").html(b);
                  var newLeft = a / (a + b) * 500 - 20 + "px"; //20为vs 的一半
                  $("#vs").animate({ left: newLeft }, 1000);
                  $("#red").animate({ width: newLeft }, 1000);
              });
          });
      });
  </script>
 
  <div id="box_bg">
      <div id="container">
          <div id="green" class="line"></div>
          <div id="red" class="line"></div>
          <div id="white" class="line"></div>
          <div id="vs"></div>
      </div>
  </div>
 
  <div style="width:440px; margin:0px auto;">
      <div id="aa2" class="scope">正方<span id="aa"></span>票</div>
      <div id="bb2" class="scope">反共<span id="bb"></span>票</div>
      <div id="all2" class="scope">总共<span id="all"></span>票</div>
  </div>