<iframe src="http://www.facebook.com/plugins/like.php?
<script type="text/javascript">document.write("window.location.href");</script>&amp;layout=button_count&amp;show_faces=true&amp;width=450&amp;action=like&amp;font=arial&amp;colorscheme=light&amp;height=21" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:450px; height:21px;" allowTransparency="true">
</iframe>


i am trying to bind current url of my page to this html
how can i do that