(function() {
        var w2898_obj = document.getElementById("w2898_18835");
        var width = "1200";
        var height = "75"
        var ua = navigator.userAgent;
        var ipad = ua.match(/(iPad).*OS\s([\d_]+)/),
                isIphone = !ipad && ua.match(/(iPhone\sOS)\s([\d_]+)/),
                isAndroid = ua.match(/(Android)\s+([\d.]+)/),
                isMobile = isIphone || isAndroid;
        if(isMobile) {
            if(document.body.clientWidth < 768 ){
                width = window.innerWidth-20;
            }
           
        }
        var protocol = (("https:" == document.location.protocol) ? "https:" : "http:")
        var gourl = protocol+"//exchange.2898.com/ad2898.htm?type=flowtext&gid=18835&size=1200*75&ad_type=7列*3行";
        if (w2898_obj) {
            var create_2898 = document.createElement("iframe");
            create_2898.width = width+'px';
            create_2898.height = height+'px';
            create_2898.frameborder = "0";
            create_2898.scrolling = "no";
            create_2898.style = "display:block;margin:0 auto;border:0;"
            create_2898.src = gourl;
            w2898_obj.parentNode.insertBefore(create_2898, w2898_obj);
        } else {
            document.write("<iframe width='"+width+"px' height='"+height+"px' frameborder='0' src='"+gourl+"' scrolling='no' style='display:block;margin:0 auto;'></iframe>");
        }
    })()