cookie的封装使用

1：设置cookie 

function setCookie(cname, cvalue, exdays) {
		var d = new Date();
		d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
		var expires = "expires=" + d.toUTCString();
		document.cookie = cname + "=" + cvalue + "; " + expires;
	}

使用：

	setCookie("routeType", "detail")

2：获取cookie

	function getCookie(cname) {
		var name = cname + "=";
		var ca = document.cookie.split(';');
		for (var i = 0; i < ca.length; i++) {
			var c = ca[i];
			while (c.charAt(0) == ' ') c = c.substring(1);
			if (c.indexOf(name) != -1) return c.substring(name.length, c.length);
		}
		return "";
	}

使用：

 getCookie("routeType")

3：清除缓存

  clearCookie("routeType");