// 拿到一个Cookie
function getCookie(cookieName) {
    var result = null;
    var domain = "121.199.43.89"; // 设置IP
    var path="/";
    var myCookie = "" + document.cookie + ";path=" + path + ";_domain=" + domain; // 发布是打开
	//var myCookie = "" + document.cookie + ";"; // 发布时注掉
	var searchName = cookieName + "=";
	var startOfCookie = myCookie.indexOf(searchName);
	var endOfCookie;
	if (startOfCookie != -1) {
		startOfCookie += searchName.length;
		endOfCookie = myCookie.indexOf(";",startOfCookie);
	    result = unescape(myCookie.substring(startOfCookie,endOfCookie));
        return result;
	} else {
	    return "";
	}
}

// 添加一个Cookie
function setCookie(cookieName, value) {
    // 要存入Cookie中的值
	var Then = new Date();
	// cookie 有效时间为10年，并定入cookie的值
	// Then.setTime(Then.getTime() + 10*365*24*60*60*1000);
	
	Then.setTime(Then.getTime() + 1*7*24*60*60*1000); // cookie 有效时间为7天，并定入cookie的值
	
	var domain = "121.199.43.89"; // 设置IP
    var path="/";
	document.cookie = cookieName + "=" + escape(value)+ ";expires ="+ Then.toGMTString() + ";path=" + path + ";_domain=" + domain; // 发布是打开
	// document.cookie = cookieName + "=" + escape(value)+ "; expires ="+ Then.toGMTString() // 发布时注掉
	
	if (getCookie(cookieName) == "") {
	    alert("您的cookie没有打开!请先打开您的cookie!");
	}
}

// 更新cookie
function upCookie(cookieName, value) {
	var result = null;
	var myCookie = "" + document.cookie + ";";
	var searchName = cookieName + "=";
	var startOfCookie = myCookie.indexOf(searchName);
	var endOfCookie;
	if (startOfCookie != -1) {
		startOfCookie += searchName.length;
		endOfCookie = myCookie.indexOf(";",startOfCookie);
		result = unescape(myCookie.substring(startOfCookie,endOfCookie));
		// 要存入Cookie中的值
		var item = "";

		var Then = new Date();
		// cookie 有效时间为10年，并定入cookie的值
		// Then.setTime(Then.getTime() + 10*365*24*60*60*1000);
		
		Then.setTime(Then.getTime() + 1*7*24*60*60*1000); // cookie 有效时间为7天，并定入cookie的值
		
		var domain = "121.199.43.89"; // 设置IP
        var path="/"; 
	    document.cookie = cookieName + "=" + escape(value)+ ";expires ="+ Then.toGMTString() + ";path=" + path + ";_domain=" + domain; // 发布是打开
	    // document.cookie = cookieName + "=" + escape(value)+ "; expires ="+ Then.toGMTString() // 发布时注掉
	}
}

// 去除Cookie
function removeCookie(cookieName) {
	var Then = new Date()
	// Cookie 的有效时间为0秒，并重写入cookie
	Then.setTime(Then.getTime());
	var domain = "121.199.43.89"; // 设置IP
    var path="/";
    // document.cookie = cookieName + "=;expires = " + Then.toGMTString(); // 发布时注掉
	document.cookie = cookieName + "=;expires = " + Then.toGMTString() + ";path="+path +";_domain=" + domain; // 发布是打开

}