function enlace(titulo, href, clsTitulo, clsHref){
	var scadena;
	scadena = "<table width='500' border='0' cellspacing='0' cellpadding='0' align=center>";
  	scadena += "<tr><td colspan='2' class='"+clsTitulo+"'>"+titulo+"</td></tr>"
  
	scadena += "<tr><td colspan='2' bgcolor='#003A81' height='1' widht='280'><img src='/i/trans.gif' width='1' height='1' widht='280'></td></tr>";
  
    scadena += "<tr><td height='17'><img src='/i/trans.gif' width='265' height='1'><br>&nbsp;&nbsp;<a href='"+href+"' target='_blank' class='"+clsHref+"'>"+href+"</a></td>";
    scadena += "<td width='15' valign='top' align='right' height='17'><img src='/i/enl/flecha-izq.gif' width='15' height='17'></td></tr></table><br>"; 
    document.write (scadena);
}