原生JavaScript将账号密码保存到cookie中（代码实现）

这个是个很常见的小知识，写个博客来记录一下，方便以后可以查看和吃老本。

核心代码

var cookiehandle = {
        getcookie: function (cookiename) {
            if (document.cookie.length > 0) {
                var c_start = document.cookie.indexof(cookiename + "=");
                if (c_start !== -1) {
                    c_start = c_start + cookiename.length + 1;
                    var c_end = document.cookie.indexof(";", c_start);
                    if (c_end === -1) c_end = document.cookie.length;
                    return decodeuricomponent(document.cookie.substring(c_start, c_end));
                }
            }
            return "";
        },
        setcookie: function (cookiename, value, expiredays) {
            var exdate = new date();
            exdate.setdate(exdate.getdate() + expiredays);
            var expire_cookie = cookiename + "=" + decodeuri(value) + ";expires=" + exdate.toutcstring();
            document.cookie = expire_cookie;
        }
    };

一般用于登录页面，当用户账号密码输入正确的时候，保存信息到cookie中

	 cookiehandle.setcookie('username',accountnum,90);
 cookiehandle.setcookie('password',passwordnum,90);

当访问登录页 的时候，读取cookie保存的值并写到输入框中

var got_cookie_account = cookiehandle.getcookie('username');
	var got_cookie_password = cookiehandle.getcookie('password');
	$('#account').val(got_cookie_account);
	$('#password').val(got_cookie_password);