$.cookie('sid', "1", {path: '/', domain: "cg.com"});// 根域名    $.cookie('sid', "2", {path: '/', domain: "test.cg.com"});//子域名    $.cookie('sid', "3", {path: '/'});//默認domain, 官方文檔：Default: domain of page where the cookie was created.    $.removeCookie('sid', {path: '/', domain: "cg.com"});    $.removeCookie('sid', {path: '/', domain: "test.cg.com"});    $.removeCookie('sid', {path: '/'});    sid1 = $.cookie('sid', {path: '/', domain: "cg.com"});    sid2 = $.cookie('sid', {path: '/', domain: "test.cg.com"});    sid3 = $.cookie('sid', {path: '/'});    sid = $.cookie('sid');    console.log(document.cookie); //=>   sid=1; sid=2; sid=3  問題1    console.log(sid); //=> 1 問題2    console.log(sid1); //=> sid=%5Bobject%20Object%5D 問題3    console.log(sid2); //=> sid=%5Bobject%20Object%5D    console.log(sid3); //sid=%5Bobject%20Object%5D問題1：為什么cookie還存在，前面不是已經刪除了嗎問題2：為什么是1而不是2或者3問題3：為什么是"sid=1; path=/; domain=cg.com"字符串，而不是value值，我該如何得到value值？