jQuery实现表格行上下移动和置顶效果

 
<table class="table"> 
  <tr> 
    <td>HTML5获取地理位置定位信息</td> 
    <td>2015-04-25</td> 
    <td><a href="#" class="up">上移</a> <a href="#" class="down">下移</a> <a href="#" class="top">置顶</a></td> 
  </tr> 
  <tr> 
    <td>CSS+Cookie实现的固定页脚广告条置顶</a></td> 
  </tr> 
  ... 
</table> 

 
$(function(){ 
  //上移 
  var $up = $(".up") 
  $up.click(function() { 
    var $tr = $(this).parents("tr"); 
    if ($tr.index() != 0) { 
      $tr.fadeOut().fadeIn(); 
      $tr.prev().before($tr); 
       
    } 
  }); 
  //下移 
  var $down = $(".down"); 
  var len = $down.length; 
  $down.click(function() { 
    var $tr = $(this).parents("tr"); 
    if ($tr.index() != len - 1) { 
      $tr.fadeOut().fadeIn(); 
      $tr.next().after($tr); 
    } 
  }); 
  //置顶 
  var $top = $(".top"); 
  $top.click(function(){ 
    var $tr = $(this).parents("tr"); 
    $tr.fadeOut().fadeIn(); 
    $(".table").prepend($tr); 
    $tr.css("color","#f60"); 
  }); 
});