var Cookies = {};

	/**

	* 设置Cookies

	*/

	Cookies.set = function(name, value){

		var argv = arguments;

		var argc = arguments.length;

		var expires = (argc > 2) ? argv[2] : null;

		if(expires != null){

        	var exp　　 = new Date();

	 		exp.setTime(exp.getTime() + 8*3600 + expires);

		}

		alert(exp.toGMTString());

		var path = (argc > 3) ? argv[3] : '/';

		var domain = (argc > 4) ? argv[4] : null;

      	var secure = (argc > 5) ? argv[5] : false;

		document.cookie = name + "=" + escape (value) +

		((expires == null) ? "" : ("; expires=" + exp.toGMTString())) +

		((path == null) ? "" : ("; path=" + path)) +

		((domain == null) ? "" : ("; domain=" + domain)) +

		((secure == true) ? "; secure" : "");

	};

	/**

	* 读取Cookies

	*/

	Cookies.get = function(name){

		var arg = name + "=";

		var alen = arg.length;

		var clen = document.cookie.length;

		var i = 0;

		var j = 0;

		while(i < clen){

			j = i + alen;

			if (document.cookie.substring(i, j) == arg)

				return Cookies.getCookieVal(j);

			i = document.cookie.indexOf(" ", i) + 1;

			if(i == 0)

				break;

		}

		return null;

	};

	/**

	* 清除Cookies

	*/

	Cookies.clear = function(name) {

		if(Cookies.get(name)){

		var expdate = new Date();

		expdate.setTime(expdate.getTime() - (86400 * 1000 * 1));

		Cookies.set(name, "", expdate);

	}

};

	Cookies.getCookieVal = function(offset){

		var endstr = document.cookie.indexOf(";", offset);

		if(endstr == -1){

			endstr = document.cookie.length;

		}

		return unescape(document.cookie.substring(offset, endstr));

	};