ajax修改密码

<div>用户名：<input type="text" id="uid" /><span id="tt" style="display:none">用户名不存在</span></div>

<div>密&nbsp;码：<input type='password' id='pwd' /><span id="ts" style="display:none">密码不正确</span></div>

<div>新密码：<input type="password" id="pod" /><span id="ta" style="display:none">新密码不能为空</span></div>

<div>新密码：<input type="password" id="ppd" /><span id="tb" style="display:none">第二次新密码不能为空</span></div>

<div ><input type="button" value="修改" id="btn" />&nbsp;<a href="dengluzhu.php"><input type="submit" value="返回" /></a></div>

</div>

</div>

<script type="text/javascript">

$(document).ready(function(e){

$("#uid").blur(function(){

    var uid = $("#uid").val()

    $.ajax({

        url:"uidchuli.php",

        data:{uid:uid},

        dataType:"TEXT",

        type:"POST",

        success: function(data){

            //alert(data);

            if(data.trim()==)

    {

        $("#tt").css("display","block");

        return false;

    }

    else if(data.trim()==)

    {

        $("#tt").css("display","none");

    }

    }

    })

    })

    })

$("#pwd").blur(function(){

    var uid = $("#uid").val();

    var  pwd = $("#pwd").val();

    $.ajax({

        url:"uidpwdchuli.php",

        data:{pwd:pwd,uid:uid},

        type:"POST",

        dataType:"TEXT",

        success: function(data){

            if(data.trim()=="no")

    {

        $("#ts").css("display","block");

        return false;

    }

            if(data.trim()=="ok")

    {

        $("#ts").css("display","none");

    }

    }

    })

    })

$("#pod").blur(function(){

    var pod = $("#pod").val();

    if(pod.trim().length==)

    {

    $("#ta").css("display","block");

    return false;

    }

    else

    {

    $("#ta").css("display","none")

    }

    })

    $("#ppd").blur(function(){

        var ppd = $("#ppd").val();

        if(ppd.trim().length==)

    {

    $("#tb").css("display","block");

    return false;

    }

    else

    {

    $("#tb").css("display","none")

    }

    })

$("#btn").click(function(){

    var uid = $("#uid").val();

    var pod = $("#pod").val();

    var ppd = $("#ppd").val();

    if(pod.trim().length!=ppd.trim().length)

    {

    alert("输入的两次密码不相同");

    return false;

    }

    else

    {

    $.ajax({

        url:"xugaichuli.php",

        data:{uid:uid,pod:pod,ppd:ppd},

        dataType:"TEXT",

        type:"POST",

        success: function(data){

        if(data.trim().length==)

        {

            alert("修改成功");

        }

        }

        })

    }

    });

</script>

//ajax修改主页

<?php

$uid=$_POST["uid"];

include("js/DBDA.class.php");

$db=new DBDA();

$sql="select count(*) from admin where adminname='{$uid}'";

echo $db->StrQuery($sql);

?>

//uid处理页面

<?php

$uid=$_POST["uid"];

$pwd=$_POST["pwd"];

include("js/DBDA.class.php");

$db=new DBDA();

$sql="select password from admin where adminname='{$uid}'";

 $mm=$db->StrQuery($sql);

if($mm==$pwd && $pwd!="")

{

    echo "ok";

}

else

{

echo "no";

}

//判断密码处理页面

<?php

$uid=$_POST["uid"];

$pod=$_POST["pod"];

include("js/DBDA.class.php");

$db=new DBDA();

$sql="update admin set password='{$pod}' where adminname='{$uid}'";

echo $db->StrQuery($sql,);

?>

//执行修改处理页面