navegador = navigator.appName;
var navVer = parseInt(navigator.appVersion);

if (navegador == "Microsoft Internet Explorer") {
document.write("<LINK href='http://www.ruv.itesm.mx/portal/apps/css/winstyles.css' rel='stylesheet' type='text/css'>");
}

if (navegador == "Netscape") {
  if(navVer==4)
  {
   document.write("<LINK href='http://www.ruv.itesm.mx/portal/apps/css/winstylesns4.css' rel='stylesheet' type='text/css'>");
  }
  else
  {
   document.write("<LINK href='http://www.ruv.itesm.mx/portal/apps/css/winstylesns.css' rel='stylesheet' type='text/css'>");
  }
}

function escribeTop(){
document.write("<table width=\"775\" border=\"0\" align=\"center\" cellpadding=\"0\" cellspacing=\"0\">");
document.write("<tr>");
document.write("<td><img src=\"http://www.ruv.itesm.mx/portal/promocion/qs/ege/imagenes/contenido/header_ege07.jpg\" width=\"776\" height=\"99\"></td>");
document.write("</tr>");
document.write("</table>");

}