function writeHeader (url, logoIzquierda, logoDerecha, site, canal, subcanal, bgcolor_top) {

var output = "";
output += '<style type="text/css">';
output += '    .textoheader {  font-family: Arial, Helvetica, sans-serif; font-size: 9px; color: #003366; text-decoration: none}';
output += '    .search { color: #333; font-style: normal; font-weight: normal; font-size: 9px; line-height: 9px; font-family: Arial, Helvetica; text-decoration: none; letter-spacing: 1pt }';
output += '	   .navegacionsuperior {  font-family: Arial, Helvetica, sans-serif; font-size: 10px; font-weight: bold; color: #FFFFFF; text-decoration: none}';
output += '    .navegacionsuperior:hover {  font-family: Arial, Helvetica, sans-serif; font-size: 10px; font-weight: bold; color: #FFCC00; text-decoration: none}';
output += '</style>';
output += '<table width="750" border="0" cellspacing="0" cellpadding="0" bgcolor="' + bgcolor_top + '">';
output += '  <tr>';
output += '    <td colspan="6" height="1"><img src="http://i.esmas.com/img/spacer.gif" width="3" height="3"></td>';
output += '  </tr>';
output += '  <tr>';
output += '    <td rowspan="2" width="164" valign="middle" align="right"><a href="' + url + '"><img src="' + logoIzquierda + '" width="279" height="78" border="0"></a></td>'; //parte gris
output += '    <td width="468" valign="top" align="left">';
output += '    </td>'; 
output += '  </tr>';
output += '  <tr bgcolor="' + bgcolor_top + '">';
output += '    <td width="24">&nbsp;</td>';
output += '    <td width="468" height="60" valign="middle" align="left" nowrap>';
output += '     <IFRAME WIDTH="468" HEIGHT="60" MARGINWIDTH="0" MARGINHEIGHT="0" HSPACE="0" VSPACE="0" FRAMEBORDER="0" SCROLLING="no" BORDERCOLOR="#000000" SRC="http://ads.esmas.com/html.ng/site=' + site + '&canal=' + canal + '&subcanal=' + subcanal + '&adsize=468x60&tile=1">';
output += '     <SCRIPT language="JavaScript" SRC="http://ads.esmas.com/js.ng/Params.richmedia=no&site=' + site + '&canal=' + canal + '&subcanal=' + subcanal + '&adsize=468x60&tile=1"></SCRIPT>';
output += '     <NOSCRIPT><A HREF="http://ads.esmas.com/click.ng/Params.richmedia=no&site=' + site + '&canal=' + canal + '&subcanal=' + subcanal + '&adsize=468x60&tile=1"><IMG SRC="http://ads.esmas.com/image.ng/Params.richmedia=no&site=' + site + '&canal=' + canal + '&subcanal=' + subcanal + '&adsize=468x60&tile=1" target="_blank"></A></NOSCRIPT></IFRAME></td>';
output += '  </tr>';
output += '  <tr>';
output += '    <td colspan="6" height="1"><img src="http://i.esmas.com/img/spacer.gif" width="1" height="1"></td>';
output += '  </tr>';
output += '</table>';


document.write(output);
}