var cookie = {	// 设置cookie方法	set:function(key, val, time){		// 获取当前时间		var date = new Date();		// 将date设置为n天以后的时间		var expiresDays = time;		// 格式化为cookie识别的时间timestamp		date.setTime(date.getTime() + expiresDays * 24 * 3600 * 1000);		document.cookie = key + "=" + val + ";expires=" + date.toGMTString();	},	// 获取cookie方法	get:function(key){		var getCookie = document.cookie.replace(/[ ]/g, "");		var arrCookie = getCookie.split(";");		var value;		for(var i = 0; i < arrCookie.length; i++){			var arr = arrCookie[i].split("=");			if(key == arr[0]){				value = arr[1];   				break;			}		}		return value;	},		// 删除cookie方法	delete:function(key){		// 获取当前时间		var date = new Date();		// 将date设置为过去的时间		date.setTime(date.getTime() - 10000);		document.cookie = key + "=v; expires =" + date.toGMTString();	}};// testcookie.set('hello', 'world', 7);var val = cookie.get('hello');console.log(val); // worldcookie.delete('hello');