Replacing Link URL with JavaScript
HTML
<a href="http://www.google.com/">Google</a><br>
<a href="http://mail.yahoo.com/">Yahoo! Mail</a><br>
<a href="http://www.sxc.hu">SXC</a><br>
CSS
body {padding:50px;}
JavaScript
$('a').each(function() {
$(this).attr('href', $(this).attr('href').replace(/$/g, "?iframe=hompimpaalaihumgambreng.blogspot.com"));
});