JQuery记住用户名和密码的具体实现

<div>

<input id="username" type="text" class="txt1" value="请输入用户名" onclick="if(this.value=='请输入用户名'){this.value=''; }" onfocus="if(this.value=='请输入用户名'){this.value=''; }" />

<input id="password" type="text" class="txt2" value="请输入密码" onclick="if(this.value=='请输入密码'){this.value='';this.type='password';}" onfocus="if(this.value=='请输入密码'){this.value='';this.type='password';}"/>

</div>

JS代码如下：

$(document).ready(function(){

if ($.cookie("rmbUser") == "true") {

$("#ck_rmbUser").prop("checked", true);

$("#username").val($.cookie("username"));

$("#password").remove();

$("#pass").append("<input id='password' type='password' class='txt2'/>");

$("#password").val($.cookie("password"));

}

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

if(check()){

login();

}

});

});

//记住用户名密码

function save() {

if ($("#ck_rmbUser").prop("checked")) {

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

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

$.cookie("rmbUser", "true", { expires: 7 }); //存储一个带7天期限的cookie

$.cookie("username", username, { expires: 7 });

$.cookie("password", password, { expires: 7 });

}else{

$.cookie("rmbUser", "false", { expire: -1 });

$.cookie("username", "", { expires: -1 });

$.cookie("password", "", { expires: -1 });

}

};

function check(){

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

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

if(username == "" || username == "请输入用户名"){

$("#tip").text("请输入用户名!");

$("#username").focus();

return false;

}

if(password == "" || password == "请输入密码"){

$("#tip").text("请输入密码!");

$("#password").focus();

return false;

}

$("#tip").text("");

return true;

}

function login(){

$.ajax({

type:"POST",

url: "login!loginValidate.action",

data:{userName:$("#username").val(),password:$("#password").val()},

dataType:"json",

beforeSend: function(){

showOverlay();

},

success:function(data){

if(data.success){

addCookie("userName", $("#username").val(), 0);

save();

location.href = "/index.jsp";

}else{

$("#overlay").hide();

$("#tip").text("用户名或密码错误，请重新登录！");

return false;

}

}

});

}