y este es mi index.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<?
include('conf/config.php') ;
include('clases/base_datos.php') ;
$bd = new base_datos() ;
$bd1 = new base_datos() ;
$navegador = identificar();
if ($navegador == 'Opera'){ die("</p><div align='center'><li><span class='errores'>Contenido No Disponible Para Opera</span>");}
?>
<link href="css/reset.css" rel="stylesheet" type="text/css">
<link rel='stylesheet' type='text/css' href='css/jquery-ui.css' />
<link rel='stylesheet' type='text/css' href='css/jquery.weekcalendar.css' />
<link rel='stylesheet' type='text/css' href='css/demo.css' />
<link rel="stylesheet" href="css/sexylightbox.css" type="text/css" media="all" />
<script type="text/javascript" src="js/mootools-yui-compressed.js"></script>
<script type="text/javascript" src="js/sexylightbox.v2.3.mootools.min.js"></script>
<script type='text/javascript' src='js/jquery-1.3.2.min.js'></script>
<script type='text/javascript' src='agenda.js'></script>
<script type='text/javascript' src='js/jquery-ui-1.7.2.min.js'></script>
<script type='text/javascript' src='js/jquery.weekcalendar.js'></script>
<script type="text/javascript">
window.addEvent('domready', function(){
SexyLightbox = new SexyLightBox();
});
</script>
</head>
<body>
<div id='calendar'></div>
<div id="event_edit_container">
<form name="calendario" onSubmit="return false">
<input type="hidden" />
<ul>
<li>
<span>Fecha: </span><span class="date_holder"></span>
</li>
<li>
<label for="title">Paciente: </label><input type="text" name="title" />
</li>
<li>
<a href="buscar_paciente.php?llama=index2&destino=par ent&TB_iframe=true&height=200&width=400&background =black" rel="sexylightbox">Buscar</a>
</li>
<li>
<label for="start">Tiempo Inicial: </label><select name="start"><option value="">Seleccione Fecha Inicial</option></select>
</li>
<li>
<label for="end">Tiempo Final: </label><select name="end"><option value="">Seleccione Fecha Final</option></select>
</li>
<li>
<label>Profesional: </label>
<select name="profesional">
<option selected="selected" value="Dra. Castillo">Dra. Castillo</option>
<option value="Dr. Diesel">Dr. Diesel</option></select>
</li>
<li>
<label for="body">Motivo: </label><textarea name="body"></textarea>
</li>
</ul>
</form>
</div>
</body>
</html>