/*
 * @param  name{string}          设置cookie名
 * @param  value{string}         设置cookie值
 * @param  options{object}       设置其他配置参数
 *
 * options.expires               过期时间（ms）
 * options.path                  路径
 * options.domain                域名
 * options.secure                secure值为true时，在http中无效，在https中有效
 */

function Cookie(name, value, options){    if(typeof value != ‘undefined‘){        options = options || {};        if(value =http://www.mamicode.com/== null){            options.expires = -1; //过期        }        var expires = ‘‘;        //存在时间选项        if(options.expires && (typeof options.expires == ‘number‘ || options.expires.toUTCString)){            var date;            if(typeof options.expires == ‘number‘){                date = new Date();                date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));            }else{                date = options.expires;            }            expires = ‘; expires=‘+date.toUTCString();        }        var path = options.path ? ‘; path=‘+options.path : ‘‘;        var domain = options.domain ? ‘; domain=‘+options.domain : ‘‘;        var secure = options.secure ? ‘; secure‘ : ‘‘;        //写入cookie        document.cookie = [name, ‘=‘, encodeURIComponent(value), expires, path, domain, secure].join(‘‘);    }else{//读取cookie        var cookValue = http://www.mamicode.com/null;        if(document.cookie && document.cookie != ‘‘){            var cookie = document.cookie.split(‘;‘);            for(var i = 0, len = cookie.length; i < len; i++){                var cookie = cookie[i].replace(/^\s+|\s+$/g, ‘‘);                if(cookie.substring(0, name.length + 1) == (name + ‘=‘)){                    cookValue = decodeURIComponent(cookie.substring(name.length + 1));                    break;                }            }        }        return cookValue;    }}
//设置Cookie("user", "小七");//获取Cookie("user");//删除Cookie("user", null);