/**
* Cookie plugin
*
* Copyright (c) 2006 ziqiu.zhang 
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
* 修改扩展：besidy (2010-01)
* Help Link：besidy
*
*/
jQuery.cookie = function(name, subName, value, options) {
    if (typeof value != 'undefined') { // name and value given, set cookie
        options = options || {};
        if (value === null) {
            value = '';
            options.expires = -1;
        }
        var expires = '';
        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(); // use expires attribute, max-age is not supported by IE
        }
        // CAUTION: Needed to parenthesize options.path and options.domain
        // in the following expressions, otherwise they evaluate to undefined
        // in the packed version for some reason...
        var path = options.path ? '; path=' + (options.path) : ';path=/';
        var domain = options.domain ? '; domain=' + (options.domain) : '';
        var secure = options.secure ? '; secure' : '';

        if (typeof subName != 'undefined' && subName != null && subName != "") {
            var mainCookieVal = jQuery.cookie(name);
            if (mainCookieVal && mainCookieVal != '') {
                var hasSubCookie = false;
                var subCookies = mainCookieVal.split('&');
                for (var j = 0; j < subCookies.length; j++) {
                    var subCookie = jQuery.trim(subCookies[j]);
                    var nvPair = subCookie.split('=');
                    if (nvPair[0] == subName) {
                        subCookies[j] = nvPair[0] + "=" + encodeURIComponent(value.toString());
                        hasSubCookie = true;
                    } else {
                        //if(nvPair[1])
                        subCookies[j] = nvPair[0] + "=" + encodeURIComponent(nvPair[1]);
                    }
                }
                if (!hasSubCookie) subCookies.push(subName + "=" + encodeURIComponent(value));
                value = subCookies.join('&');
            } else {
                value = subName + "=" + encodeURIComponent(value.toString());
            }
        } else {
            //If value is an object, each property will be a sub key;
            if (typeof value == "object") {
                var k = 0;
                var tempResult = "";
                for (var tempValue in value) {
                    if (k > 0) {
                        tempResult += "&";
                    }
                    tempResult += tempValue + "=" + encodeURIComponent(value[tempValue]);
                    k++;
                }
                value = tempResult;
            }
            else {
                value = encodeURIComponent(value);
            }
        }
        document.cookie = [name, '=', value, expires, path, domain, secure].join('');
    } else { // only name given, get cookie
        var cookieValue = null;
        if (document.cookie && document.cookie != '') {
            var cookies = document.cookie.split(';');
            for (var i = 0; i < cookies.length; i++) {
                var cookie = jQuery.trim(cookies[i]);
                // Does this cookie string begin with the name we want?
                if (cookie.substring(0, name.length + 1) == (name + '=')) {
                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                    //Search sub key
                    if (typeof subName != 'undefined' && subName != null && subName != "") {
                        var subCookies = cookieValue.toString().split('&');
                        cookieValue = null;
                        for (var j = 0; j < subCookies.length; j++) {
                            var subCookie = jQuery.trim(subCookies[j]);
                            if (subCookie.substring(0, subName.length + 1) == (subName + '=')) {
                                cookieValue = decodeURIComponent(subCookie.substring(subName.length + 1));
                                break;
                            }
                        }
                    }
                    break;
                }
            }
        }
        return cookieValue;
    }
};