<script type="text/javascript">
<!--
//
var _img_grande;
function mostrar() {
var ops = "top=" + ((screen.height - _img_grande.height) / 2);
ops += ",left=" + ((screen.width - _img_grande.width) / 2);
ops += ",width=" + _img_grande.width + ",height=" + _img_grande.height;
var contenido = "<html><body style='background-image: url(" + _img_grande.src + ")'></body></html>";
var ventana = window.open("", "", ops);
ventana.document.write(contenido);
ventana.document.close();
}
function cargando() {
if (_img_grande.complete) mostrar();
else setTimeout("cargando()", 100);
}
function abrir(imagen) {
_img_grande = new Image();
_img_grande.src = imagen;
cargando();
}//
// -->
</script>
</head>
<body>
<img src=".../tu_imagen_chica.jpg"
onclick="abrir ('.../tu_imagen_grande.jpg')"
width="118" height="118"
style="border-style:none; margin-left:10px; margin-right:10px; vertical-align:text-top; cursor: pointer" alt="Larger Picture" />