function cabecera(){ 
txt  = ""; 
txt += "<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\"  width=\"780\" bgcolor=\"#FFFFFF\">\n";
txt += "<tr> <td width=\"211\" rowspan=\"2\">	<div align=\"center\"><font color=\"#FFFFFF\"><img src=\"imagenes/logo_saveyco.gif\" width=\"146\" height=\"100\"></font></div></td>\n";
txt += "<td height=\"64\" align=\"right\" valign=\"top\"><img src=\"imagenes/www_up.jpg\" width=\"137\" height=\"79\"></td>\n";
txt += "<td align=\"right\" valign=\"top\"><img src=\"imagenes/head_left_up.jpg\" width=\"143\" height=\"79\"></td>\n";
txt += "<td align=\"right\" valign=\"top\"><img src=\"imagenes/head_center_up.jpg\" width=\"147\" height=\"79\"></td>\n";
txt += "<td align=\"right\" valign=\"top\"> <p><img src=\"imagenes/head_right_up.jpg\" width=\"141\" height=\"79\"></p></td>\n";
txt += "<tr> <td align=\"right\" valign=\"top\"><div align=\"right\"><img src=\"imagenes/www_down.jpg\" width=\"137\" height=\"55\"></div></td>\n";
txt += "<td align=\"right\" valign=\"top\"><img src=\"imagenes/head_left_down.jpg\" width=\"143\" height=\"55\"></td>\n";
txt += "<td align=\"right\" valign=\"top\"><img src=\"imagenes/head_center_down.jpg\" width=\"147\" height=\"55\"></td>\n";
txt += "<td align=\"right\" valign=\"top\"><img src=\"imagenes/head_right_down.jpg\" width=\"141\" height=\"55\"></td>\n";
txt += "</tr></tr></table>\n";
txt += "<table width=\"780\" border=\"0\" cellspacing=\"0\" background=\"imagenes/barra_cabecera.gif\"><tr><td class=\"fecha\" align=\"left\"><img src=\"imagenes/sp.gif\" width=\"15\" height=\"1\"><a href=\"index.html\" class=\"fecha\">Inicio</a> | <a href=\"mailto:asveyco@asveyco.org\" class=\"fecha\">Contacto</a> | Mapa Web</td><td class=\"fecha\" align=\"right\"><script language=\"JavaScript\">document.write(\"&nbsp;\"+isnDays[today.getDay()]+\", \"+today.getDate()+\"-\"+isnMonths[today.getMonth()]+\"-\"+getFullYear(today)+\"\");</script>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td></tr><tr><td colspan=\"2\" bgcolor=\"#336699\"><img src=\"imagenes/sp.gif\" height=\"2\"></td></tr></table>\n";
txt += "</tr></table>\n";
document.write(txt);
}