jQuery.cookie应用操作

//1.插件框架：
/*
* name      @键
* value     @值
* options   @选项，包括有效期 路径 域名等
*/
jQuery.cookie = function(name, value, options) {}

var cookie_name = 'cookie_name';

//2.1、设置cookie，通过时间间隔，单位"天"
$.cookie(cookie_name, 'cookie值', { path: '/', expires: 1 });

//2.2、设置cookie，通过到期时间，如：二十四小时后失效
var date = new Date(); 
date.setTime(date.getTime() + (1 * 24 * 60 * 60 * 1000));
$.cookie(cookie_name, 'cookie值', { path: '/', expires: date });

//2.3、设置cookie，通过时间间隔，并且要求域名有效
$.cookie(cookie_name, 'cookie值', {expires: 7, path: '/', domain: 'gzmsg.com', secure: true});

//3、获取cookie 
var cookie_value = $.cookie(cookie_name);
if (typeof (cookie_name) != "undefined" || cookie_name != null) {
    //doing code
}
//4.1、删除cookie，删除所有cookie_name的键
$.cookie(cookie_name, null);

//4.2、删除cookie，删除对应options选项的cookie_name的键
$.cookie(cookie_name, null, path: '/', domain: 'gzmsg.com');

//5、jQuery.cookie源码
jQuery.cookie = function(n, v, o) {
    if (typeof v != "undefined") {
        o = o || {};
        if (v === null) {
            v = "";
            o.expires = -1
        }
        var e = "";
        if (o.expires && (typeof o.expires == "number" || o.expires.toUTCString)) {
            var f;
            if (typeof o.expires == "number") {
                f = new Date();
                f.setTime(f.getTime() + (o.expires * 24 * 60 * 60 * 1000))
            } else {
                f = n.expires
            }
            e = "; expires=" + f.toUTCString()
        }
        var l = o.path ? "; path=" + (o.path) : "";
        var g = o.domain ? "; domain=" + (o.domain) : "";
        var a = o.secure ? "; secure" : "";
        document.cookie = [n, "=", encodeURIComponent(v), e, l, g, a].join("")
    } else {
        var d = null;
        if (document.cookie && document.cookie != "") {
            var k = document.cookie.split(";");
            for (var h = 0; h < k.length; h++) {
                var c = jQuery.trim(k[h]);
                if (c.substring(0, n.length + 1) == (n + "=")) {
                    d = decodeURIComponent(c.substring(n.length + 1));
                    break
                }
            }
        }
        return d
    }
}