记住密码功能 JS结合JQuery 操作 Cookie 实现记住密码和用户名！

// 记住密码功能 JS结合JQuery 操作 Cookie 实现记住密码和用户名！

var username = document.getElementById("username");

var password = document.getElementById("password");

var date=new Date();

var expiresDays=1000;  //过期时间。

date.setTime(date.getTime()+expiresDays*24*3600*1000);

var str_in;

var str_out = "";

var num_in;

var num_out = "";

//加密

function str_to_num(val) {

    num_out = "";

    //if(form.input.value == "") alert(e);

    //else {

    str_in = escape(val);

    for(i = 0; i < str_in.length; i++) {

    num_out += str_in.charCodeAt(i) - 23;

    }

    //form.output.value = num_out;

    //form.input.value = "";

    return num_out;

}

//解密

function num_to_str(val) {

    str_out = "";

    num_out = val;

    for(i = 0; i < num_out.length; i += 2) {

    num_in = parseInt(num_out.substr(i,[2])) + 23;

    num_in = unescape('%' + num_in.toString(16));

    str_out += num_in;

    }

    var str_out_jm = unescape(str_out);

    return str_out_jm ;

}

$(function(){

    $(".data_sub.sub_click").click(function(){

        if(document.getElementById("checkBox").checked){

            document.cookie = "a="+ str_to_num(username.value)+"; expires=" + date.toGMTString();

;

            document.cookie = "b="+ str_to_num(password.value)+"; expires=" + date.toGMTString();

        }else{

            return;

        }

    });

    var user = getCookie("a");

    var pass = getCookie("b");

    if(username.value == "")

    {

        username.value = num_to_str(user);

    }

    if(password.value == ""){

        password.value = num_to_str(pass);

    }

    });

});

function getCookie(name){

    var strCookie=document.cookie;

    var arrCookie=strCookie.split("; ");

    for(var i=0;i<arrCookie.length;i++){

        var arr=arrCookie[i].split("=");

        if(arr[0]==name)return arr[1];

    }

    return "";

}