In some point of our internet lives we have to hide the Referring URL (HTTP_REFERER) value to a website landing page. That technique is called Link Cloaking, which prominently used in affiliate marketing.
<iframe onload=”window.setTimeout(‘go();, 99)” src=”about:blank” style=”visibility:hidden”></iframe>
Note: Although working, most browsers undergo improvements which can render the script useless. So while working, use it!