Example:
Red indicates necessary changes, Yellow represents optional changes. All other code MUST stay intact.
<!-- Code Designed by Aleric H. Get it here: AlericCodes.blogspot.com -->
<script language="javascript" type="text/javascript">
// <![CDATA[
function popNow(target) { popWin = window.open(target, "Subscribe","width=530,height=330,status=yes");
popWin.moveTo(100,80); }
// ]]>
</script>
<a href="javascript:%20popNow('http://www.youtube.com/subscription_center?&add_user=USERNAME')"><img alt="http://farm8.staticflickr.com/7018/6590287393_6266ed9f94_m.jpg" class="alignleft" height="31" name="subscribe.jpg" src="http://applewizdom.com/wp-content/uploads/2011/12/subscribe.jpg" width="94" /></a>
<!-- Code Designed by Aleric H. Get it here: AlericCodes.blogspot.com -->
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