JavaScript中添加、删除、获得cookie值的函数封装

//封装cookie的操作//功能一：添加cookie的操作function addCookie(cookieKey,cookieValue,overSeconds){document.cookie = cookieKey +"="+cookieValue +";max-age="+overSeconds;}//功能二：删除cookie的操作function deleteCookie(cookieKey){//方式一//document.cookie = cookieKey +"=;max-age=-1";//方式二addCookie(cookieKey,"",-1);}//功能三：通过key，获取cookie中对应的value值function getCookie(cookieKey){var arr = document.cookie.split("; ");for (var i = 0;i < arr.length;i++) {var arr2 = arr[i].split("=");//遍历时，arr2[0]存储此时的key，arr[1]存储key对应的value值if (arr2[0].trim() == cookieKey) {//找出该key值return arr2[1];}}}//功能四：判断cookie是否存在function isCookieKey(cookieKey){var arr = document.cookie.split(";");for (var i = 0;i < arr.length;i++) {var arr2 = arr[i].split("=");if (arr2[0].trim() == cookieKey) {//找出该key值return true;}}return false;}