function addCookie(cookieKey, cookieValue, overSeconds) {
document.cookie = cookieKey + "=" + cookieValue + ";max-age=" + overSeconds;
}
function deleteCookie(cookieKey) {
//方式一
document.cookie = cookieKey + "=;max-age=-1";
//方式二 addCookie(cookieKey,"",-1)
}
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];
}
}
}
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;
}
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