(function() {

    //获取对象
    var $ = function(id) { if (document.getElementById) { return eval('document.getElementById("' + id + '")') } else { return eval('document.all.' + id) } };

    //获取cookie
    var getAdCookie = function(N) {
        var c = document.cookie.split("; ");
        for (var i = 0; i < c.length; i++) { var d = c[i].split("="); if (d[0] == N) return unescape(d[1]); }
        return "";
    };

    //设置cookie
    var setAdCookie = function(N, V, Q) {
        var L = new Date();
        var z = new Date(L.getTime() + Q * 3600000);

        document.cookie = N + "=" + escape(V) + ";path=/;domain=sina.com.cn;expires=" + z.toGMTString() + ";";

    };

    //构造函数
    var init = function() {
        try {
            document.write('\
		  <style type="text/css">\
			html{background:url() repeat-x 0 0;}\
			body{background:url(web/jd90year/jd90year_02.jpg) no-repeat top center;padding-top:0;margin-top:0;}\
			.topAD{background:#fff;}\
			#wrap{padding-top:0;margin-top:0;}\
		  </style>\
		  <div id="2008TopBar" style="clear:both;width:950px;height:80px;margin:0 auto;padding:0;overflow:hidden;position:relative;">\
			\
			<div id="2008TopBarClose" style="width:44px;height:18px;padding:0;margin:0;position:absolute;right:0;bottom:0;cursor:pointer;display:block;background:url(web/jd90year/jd90year_03.gif) no-repeat;z-index:2;" title="关闭背景"></div>\
		  </div>\
		  <div id="2008TopBlank" style="clear:both;height:5px;line-height:0;font-size:0;overflow:hidden;display:none;"></div>\
		');

            $("2008TopBarClose").onclick = function() {
                document.documentElement.style.background = "none";
                document.body.style.background = "none";
                $("2008TopBar").style.display = "none";
                $("2008TopBlank").style.display = "block";
                setAdCookie("jd90year", 0, 24);
            };
        } catch (e) { }
    }

    var cookie = getAdCookie("jd90year");
    cookie = cookie == "" ? 1 : cookie;
    if (cookie == 1) { init(); }

})();