jquery登录的异步验证

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//定义一个json
var validate = {
    username : false,
    pwd      : false,
    pwded    : false,
    verify   : false,
    loginUsername : false,
    loginPwd :false
}
 
//存储错误信息
var $msg = "";
 
//验证注册表单
$(function(){
    //获取表单对象
    var register = $('form[name=register');
    register.submit(function(){
        var isOK = validate.username && validate.pwd && validate.pwded && validate.verify;
        if(isOK){
            return true;
        }
        //点击提交按钮依次触发失去焦点再次验证
        $('input[name=username]',register).trigger('blur');
        $('input[name=pwd]',register).trigger('blur');
        $('input[name=pwded]',register).trigger('blur');
        $('input[name=verify]',register).trigger('blur');
        return false;
    });
 
    //验证用户名
    $('input[name=username]',register).blur(function(){
        var username = $(this).val();
        var span = $(this).next();
 
        //用户名不能为空
        if(username == ''){
            msg = '用户名不能为空';
            span.html(msg).addClass('error');
            validate.username = false;
            return;
        }
 
        //正则判断
        if(!/^\w{2,14}$/g.test(username)){
            msg = '必须是2-14个字符,字母,数字,下划线';
            span.html(msg).addClass('error');
            validate.username = false;
            return;
        }
 
        //异步验证用户名是否存在
        $.post(APP + '/Reg/ajax_username',{username : username},function(status){
            console.log(status);
            if(status){
                msg = '通过检测';
                span.html(msg).removeClass('error');
                validate.username = true;
            }else{
                msg = '用户名已经存在';
                span.html(msg).addClass('error');
                validate.username = false;
            }
        },'json');
    });
 
    //验证密码
    $('input[name=pwd]',register).blur(function(){
        var pwd = $(this).val();
        var span = $(this).next();
 
        //密码不能为空
        if(pwd == ''){
            msg = '密码不能为空';
            span.html(msg).addClass('error');
            validate.pwd = false;
            return;
        }
 
        //正则验证
        if(!/^\w{6,20}$/g.test(pwd)){
            msg = '密码必须由6-20个字母,数字,或者下划线组成';
            span.html(msg).addClass('error');
            validate.pwd = false;
            return;
        }
 
        msg = '通过检测';
        span.html(msg).removeClass('error');
        validate.pwd = true;
    });
 
    //确认密码
    $('input[name=pwded]',register).blur(function(){
        var pwded = $(this).val();
        var span = $(this).next();
 
        //确认密码
        if(pwded == ''){
            msg = '请确认密码';
            span.html(msg).addClass('error');
            validate.pwded = false;
            return;
        }
 
        //判断密码是否一致
        if(pwded != $('input[name=pwd]',register).val()){
            msg = '密码不一致';
            span.html(msg).addClass('error');
            validate.pwded = false;
            returnl;
        }
 
        msg = '通过检测';
        span.html(msg).removeClass('error');
        validate.pwded = true;
    });
 
    //验证验证码
    $('input[name=verify]',register).blur(function(){
        var verify = $(this).val();
        var span = $(this).next().next();
 
        //不能为空
        if(verify == ''){
            msg = '请输入验证码';
            span.html(msg).addClass('error');
            validate.verify = false;
            return;
        }
 
        //异步判断验证码
        $.post(APP + '/Reg/ajax_code',{verify : verify},function(status){
            if(status){
                msg = '通过检测';
                span.html(msg).removeClass('error');
                validate.verify = true;
            }else{
                msg = '验证码错误';
                span.html(msg).addClass('error');
                validate.verify = false;
                return;
            }
        },'json');
    });
 
    //登录form表单验证
    var login = $('form[name=login]');
 
    //登录提交事件
    login.submit(function(){
        if(validate.loginUsername && validate.loginPwd){
            return true;
        }
        //依次触发失去焦点动作
        $('input[name=username]',login).trigger('blur');
        $('input[name=pwd',login).trigger('blur');
        return false;
    });
 
    //验证登录用户名
    $('input[name=username]',login).blur(function(){
        var username = $(this).val();
        var span = $('#login-msg');
 
        //判断是否为空
        if(username == ''){
            msg = '请输入账号';
            span.html(msg).addClass('error');
            validate.loginUsername = false;
            return;
        }
        msg = '';
        span.html(msg);
        validate.loginUsername = true;
    });
 
    //验证登录密码
    $('input[name=pwd]',login).blur(function(){
        var pwd = $(this).val();
        var span = $('#login-msg');
 
        //判断登录密码是否为空
        if(pwd == ''){
            msg = '请输入密码';
            span.html(msg).addClass('error');
            validate.loginPwd = false;
            return;
        }
 
        var data = {
                username : $('input[name=username]',login).val(),
                pwd : pwd
            };
 
        //异步验证
        $.post(APP + '/Login/ajax_login',data,function(status){
            if(status){
                msg = '';
                span.html(msg).removeClass('error');
                validate.loginUsername = true;
                validate.loginPwd = true;
            }else{
                msg = '用户名或密码错误';
                span.html(msg).addClass('error');
                validate.loginUsername = false;
                validate.loginPwd = false;
            }
        },'json');
 
        msg = '';
        span.html(msg);
        validate.loginPwd = true;
    });
})

  

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