Cookie

gistfile1.js

/***
 * AKD
 * ----------------------------------------------------------------------------
 * <Cookie.js> - 2014/8/20
 * @version 0.1
 * @author  Joye, maolion.j@gmail.com
 * @website http://maolion.com
 */

function cookie(key, value, expires, path){
    if (arguments.length === 1) {
        var match = document.cookie.match(new RegExp('(?:^|\\s+)'+key+'=([^;]*);?', 'm'));
        return match ? match[1] : undefined;
    } else {
        document.cookie = key + '=' + value
                        + (expires ? ";expires=" + cookie.parseExpires(expires) : '')
                        + ";path=" + (path||"/")
        ;

    }
};

cookie.MT = 2678400000;
cookie.WT = 604800000;
cookie.DT = 86400000;   
cookie.HT = 3600000;

cookie.parseExpires = function(expires) {
    var 
        e = 0,
        d = new Date(),
        u = (''+expires).slice(-1).toUpperCase() + 'T'
    ;
    if (cookie.hasOwnProperty(u)) {
        e = d.getTime() + ~~expires.slice(0, -1) * cookie[u];
    } else if(expires == -1){
        e = d.getTime() - 1;
    } else {
        e = ~~expires;
    }
    d.setTime(e);
    return d.toGMTString();
};

/*
写
cookie("a","b");
cookie("a", "b", "1w");一周期限 nw 是n周 nm是n月 nd 是 n天 nh是 n小时
cookie("a", "b", "1w", "/"); 最后一个是域
读
var d = cookie("a);
*/