He sacado de http://jquery.com/demo/thickbox/
Código HTML:
<html> <head> <script type="text/javascript" src="include/jquery.js"></script> <script type="text/javascript" src="include/thickbox.js"></script> <style type="text/css" media="all">@import "include/thickbox.css";</style> </head> <body> <a id="pp" href="ajaxLogin.html?height=85&width=250&modal=true" class="thickbox" title="Please Sign In">fdsaas</a> </body> </html>
Gracias por todo de antemana y un saludo