there's not such a thing.
1. this script doesnt work at all in firefox
2. it uses javascript, which some users may have disabled
but if you're still looking for such a code that reduces even more the chances to display the linked url try this
<a href="http://www.scriptingok.com" target="_blank"
onmouseover="this.blur(); window.status='its working, right?'; return true"
onfocus="this.blur(); window.status='youre welcome'; return true"
onmouseout="this.blur(); window.status=';)'; return true">LINK</a>