<div> 
  <input type="button" onclick="up();" value=" 上移 "> 
  <input type="button" onclick="down();" value=" 下移 "> 
</div> 
 <div> 
<table width="400px" height="200" class="mytable" cellpadding="5" cellspacing="0"> 
<tr> 
 <td>序号</td> 
 <td>名字</td> 
  <td>性别</td> 
</tr> 
 <tr> 
 <td><input type="checkbox" id="c1"/>1</td> 
 <td>小一</td> 
  <td>男</td> 
</tr> 
 <tr> 
 <td><input type="checkbox" id="c2"/>2</td> 
 <td>小二</td> 
  <td>女</td> 
</tr> 
<tr> 
 <td><input type="checkbox" id="c3"/>3</td> 
 <td>小三</td> 
  <td>女</td> 
</tr> 
</table> 
lt;/div> 

.mytable td,.mytable{ 
 font-size:12px; 
 color:red; 
 border:1px solid #000; 
 text-align:center; 
 border-collapse:collapse; 
 } 

$.each($("table input:checked"),function(){ 
  var onthis=$(this).parent().parent(); 
  var getUp=onthis.prev(); 
   
  if ($(getUp).has("input").size()==0) 
  { 
   alert("顶级元素不能上移"); 
   return; 
  } 
  $(onthis).after(getUp); 
 }); 
} 
 function down(){ 
 $.each($("table input:checked"),function(){ 
  var onthis=$(this).parent().parent(); 
  var getdown=onthis.next(); 
  $(getdown).after(onthis); 
 }); 
}