var bannerDivWrapper = "<div id='banner_div' class='banner_div' style='width: 100%; height: 100px; text-align: center; margin: 0px; margin-top: 0px; margin-left: 0px; margin-bottom:10px'><center><a href='http://www.networkingusa.org/goto_banner.php?BannerID=5' ><img border='0' src='http://www.networkingusa.org/Banners/flemings.jpg' ></a></center></div>";

$("#xg").before(bannerDivWrapper);