function abreMarquesina(){
  document.write('<marquee scrollamount="2" direction="up" loop="true"  style="height:100px" id="scroll">');
  document.write('  <table border="0" cellspacing="0" cellpadding="0" style="height:100px">');
};

function cierraMarquesina(){
  document.write('  <tr><td colspan="3" style="background:url(../../opennet/images/homepage/i_px_linea_puntos.jpg);"><IMG HEIGHT="1" SRC="../../common/images/administracion/_blank.gif" alt="espacio"></tr>');
  document.write('  </table>');
  document.write('</marquee>');
};