Facebook "Like" Button on Blogger

<script language="javascript">
fb_like = &amp;quot;http://www.facebook.com/plugins/like.php?href=<b:if cond='data:blog.url'><data:post.url/></b:if>&amp;quot;;
document.write(&amp;quot;<iframe scrolling='no' frameborder='0' allowTransparency='true' style='border:none; margin:10px 0 0 0; overflow:hidden; width:450px; height:auto;' allowtransparency='true' src='&amp;quot;+ fb_like +&amp;quot;'/>&amp;quot;);
</script>