//$.cookie("xx");//读取xx的值

//$.cookie("xx","123");//设置xx的值为123

//$.cookie("xx","123",{expires:7})//设置xx的值为123并保存7天 有效期为7天

//$.cookie("xx","123",{expires:7,path:"/"})

<script src="js/jquery.js"></script>

<script src="js/jquery.cookie.js"></script>

<input type="text" placeholder="用户名" id="txtName">

<input type="password" placeholder="密码" id="txtPwd">

<input type="checkbox" id="chkRememberPwd">记住密码

<button>登录</button>

<script>

$(function () {

    $("#txtName").val($.cookie("name"));

    $("#txtPwd").val($.cookie("pwd"));

    if($.cookie("chkRememberPwd") == ""){

        $("#chkRememberPwd").prop("checked","checked");

    }else{

        $("#chkRememberPwd").prop("checked","");

    }

    $("button").click(function(){

       var name = $("#txtName").val();

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

       if($("#chkRememberPwd").is(":checked")){

           console.log("");

           $.cookie("name",name);

           $.cookie("pwd",pwd);

           $.cookie("chkRememberPwd","");

       }else{

           $.cookie("name","");

           $.cookie("pwd","");

           $.cookie("chkRememberPwd","");

       }

    });

})

</script>