te refieres a esto??
<script language="JavaScript" type="text/javascript" src="../../../../js/openVFStretchScroll"></script>
<script language="JavaScript" type="text/javascript" src="../../../../js/funciones.js"></script>
</head>
<body background="../../../../imagenes/fondo.jpg">
<div id="Layer4" style="position:absolute; left:563px; top:233px; width:100px; height:86px; z-index:6"><a href="javascript
:openVFStretchScroll('mapa.htm',50 4,600,'mapa')" ><img src="../../../../imagenes/mapas/thumbs/museoborja.jpg" alt="Haz click para abrir ventana desde imagen" width="80" height="95" border="0"></a></div>
si te refieres a esto no funciona