ajax传值修改数据

主界面代码：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script src="jquery-1.8.3.min.js" type="text/javascript" charset="utf-8"></script>
</head>
<style type="text/css">
.xiugai{
cursor: pointer;
color:blue ;
}
table td{
padding: 0px;
}
</style>
<body><body>
<table cellpadding="0" cellspacing="0" border="1" width="100%" >
<tr style="text-align: center; "><td>老师</td><td>代号</td><td>密码</td><td>操作</td></tr>
<tbody id="nr"></tbody>
</table>
</body>

</body>
<script type="text/javascript">

Show();
function Show(){
$.ajax({
type:"post",
url:"xianshi.php",
dataType:"JSON",
success:function(d){
var str="";
for(var k in d)
{
str+="<tr> <td><input type='text' name='"+d[k].uid+"' style='width:100%; border:hidden' value='"+d[k].name+"' /></td><td><input type='text' code='"+d[k].uid+"' style=' width:100%; border:hidden' value='"+d[k].code+"' /></td> <td><input type='text' pwd='"+d[k].uid+"' style='width:100%;border:hidden' value='"+d[k].pwd+"' /></td><td style='text-align: center;'><span class='xiugai' uid='"+d[k].uid+"' >修改<span></td></tr>"
}
$("#nr").html(str);
$(".xiugai").click(function(){
var uid = $(this).attr("uid");
var name=$("[name='"+uid+"']").val();
var code=$("[code='"+uid+"']").val();
var pwd=$("[pwd='"+uid+"']").val();
$.ajax({
type:"post",
url:"gai.php",
data:{uid:uid,name:name,code:code,pwd:pwd},
success:function(t){
alert("修改成功");
Show();
}
});
})
}
});
}

</script>
</html>

xianshi.php页面代码：

<?php
include("DBDA.class.php");
$db = new DBDA();
$sql = " select * from user where position='老师' ";
echo $db->JSONQuery($sql);
?>

效果图

gai.php页面代码：

<?php
include("DBDA.class.php");
$db = new DBDA();
$uid = $_POST["uid"];
$name = $_POST["name"];
$code = $_POST["code"];
$pwd = $_POST["pwd"];
$sql= " update user set name='{$name}',code='{$code}',pwd='{$pwd}' where uid='{$uid}' ";
$db->Query($sql,0);
?>

效果图

：