js设置cookie过期及清除浏览器对应名称的cookie

function ClearCookie() {
var expires = new Date();
expires.setTime(expires.getTime() - 1000); //当前时间减去一秒,相当于立即过期(可以增减)
document.cookie = "appCode=222;path=/;expires=" + expires.toGMTString() + ""; //expires是对应过期时间的设置,不设这个值,cookie默认在关闭浏览器时失效
document.cookie = "roleID=333;path=/;expires=" + expires.toGMTString() + "";
document.cookie = "parentMenuID=000;path=/;expires=" + expires.toGMTString() + "";
document.cookie = "currentMenuName=哈哈;path=/;expires=" + expires.toGMTString() + "";
}