js对cookie设置、修改、删除操作

添加cookie

var cookiesUtility = {
        };

        /*设置Cookie*/
        cookiesUtility.setCookies = function (name, value, option) {
            var _strCookie = name + "=" + escape(value); //设置键/值对
            if (option) {
                //是否设置时间:ps小时
                if (option.hour) {
                    var _exdate = new Date();
                    _exdate.setTime(_exdate.getTime() + option.hour * 60 * 60 * 1000);
                    _strCookie += ";expires=" + _exdate.toGMTString(); //设置过期时间：ps小时为单位
                }
                if (option.path) {
                    _strCookie += "; path=" + option.path; //设置访问路径
                }
                if (option.domain) {
                    _strCookie += "; domain=" + option.domain; //设置访问域
                }
                if (option.secure) {
                    _strCookie += "; secure"; //设置安全性
                }
            }
            document.cookie = _strCookie;
        }

获取Cookie

 /*获取Cookie*/
        cookiesUtility.getCookies = function (name) {
            if (document.cookie.length > 0) {
                var _cookieVal = "; " + document.cookie;//列如：ss=1;sss=2;s=3 为了防止取s时取到第一个ss的值
                var _startIndex = _cookieVal.indexOf("; " + name + "=");
                if (_startIndex != -1) {
                    _startIndex = _startIndex + name.length + 3;
                    var _endIndex = _cookieVal.indexOf(";", _startIndex);
                    if (_endIndex == -1) {
                        _endIndex = _cookieVal.length;
                    }
                    return unescape(_cookieVal.substring(_startIndex, _endIndex));
                }
                return "";
            }
            else {
                return "";
            }
        }

删除Cookie

/*删除Cookie*/
        cookiesUtility.deleteCookies = function (name) {
            var _exdate = new Date();
            _exdate.setTime(_exdate.getTime() - 1);
            var _cookiesVal = cookiesUtility.getCookies(name);
            if (_cookiesVal != null) {
                document.cookie = name + "=" + _cookiesVal + ";expires=" + _exdate.toGMTString();
            }
        }