<div id="roll"></div><input type="hidden" id="mid" value=""> 
<p><input type="button" class="btn" id="start" value="开始"> 
<input type="button" class="btn" id="stop" value="停止"></p> 
<div id="result"></div> 

.demo{width:300px; margin:60px auto; text-align:center} 
#roll{height:32px; line-height:32px; font-size:24px; color:#f30} 
.btn{width:80px; height:26px; line-height:26px; background:url(btn_bg.gif) 
 repeat-x; border:1px solid #d3d3d3; cursor:pointer} 
#stop{display:none} 
#result{margin-top:20px; line-height:24px; font-size:16px; text-align:center} 

$(function(){ 
  var _gogo; 
  var start_btn = $("#start"); 
  var stop_btn = $("#stop"); 
   
  start_btn.click(function(){ 
    $.getJSON('data.php',function(json){ 
      if(json){ 
        var obj = eval(json);//将JSON字符串转化为对象 
        var len = obj.length; 
        _gogo = setInterval(function(){ 
          var num = Math.floor(Math.random()*len);//获取随机数 
          var id = obj[num]['id']; //随机id 
          var v = obj[num]['mobile']; //对应的随机号码 
          $("#roll").html(v); 
          $("#mid").val(id); 
        },100); //每隔0.1秒执行一次 
        stop_btn.show(); 
        start_btn.hide(); 
      }else{ 
        $("#roll").html('系统找不到数据源，请先导入数据。'); 
      } 
    }); 
  }); 
}); 

  stop_btn.click(function(){ 
    clearInterval(_gogo); 
    var mid = $("#mid").val(); 
    $.post("data.php?action=ok",{id:mid},function(msg){ 
      if(msg==1){ 
        var mobile = $("#roll").html(); 
        $("#result").append("<p>"+mobile+"</p>"); 
      } 
      stop_btn.hide(); 
      start_btn.show(); 
    }); 
  }); 

include_once('connect.php'); //连接数据库 
 
$action = $_GET['action']; 
if($action==""){ //读取数据，返回json 
  $query = mysql_query("select * from member where status=0"); 
    while($row=mysql_fetch_array($query)){ 
    $arr[] = array( 
      'id' => $row['id'], 
      'mobile' => substr($row['mobile'],0,3)."****".substr($row['mobile'],-4,4) 
    ); 
  } 
  echo json_encode($arr); 
}else{ //标识中奖号码 
  $id = $_POST['id']; 
  $sql = "update member set status=1 where id=$id"; 
  $query = mysql_query($sql); 
  if($query){ 
    echo '1'; 
  } 
} 

CREATE TABLE `member` ( 
 `id` int(11) NOT NULL auto_increment, 
 `mobile` varchar(20) NOT NULL, 
 `status` tinyint(1) NOT NULL default '0', 
 PRIMARY KEY (`id`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8;