Это Flash + JS.
Вот частичка сгенерированного кода (кстати это к вопросу о сокрытии исходного кода)
HTML код:
<script src="./pagepeelads/PagePeelAds.js" type="text/javascript"></script>
<div id="PagePeelSmall" style="position: absolute; width: 100px; height: 100px; z-index: 9999; right: 0px; top: 0px;">
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" id="PagePeelSmallObject" width="100" height="100">
<param name="allowScriptAccess" value="always">
<param name="movie" value="./pagepeelads/small.swf?ico=./pagepeelads/images/sixpack_75.gif">
<param name="wmode" value="transparent">
<param name="quality" value="high">
<param name="FlashVars" value="ico=./pagepeelads/images/sixpack_75.gif">
<embed src="./pagepeelads/small.swf?ico=./pagepeelads/images/sixpack_75.gif" name="PagePeelSmallObject" wmode="transparent" quality="high" flashvars="ico=./pagepeelads/images/sixpack_75.gif" allowscriptaccess="always" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" width="100" height="100">
</object>
</div>
<div id="PagePeelBig" style="position: absolute; width: 650px; height: 650px; z-index: 9999; right: 0px; top: -1000px;">
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" id="PagePeelBigObject" width="650" height="650">
<param name="allowScriptAccess" value="always">
<param name="movie" value="./pagepeelads/big.swf?big=./pagepeelads/images/sixpack_500.gif&ad_url=http%3A//cymrusteve.6packquest.hop.clickbank.net/%3Ftid%3D100PPA">
<param name="wmode" value="transparent">
<param name="quality" value="high">
<param name="FlashVars" value="big=./pagepeelads/images/sixpack_500.gif&ad_url=http%3A//cymrusteve.6packquest.hop.clickbank.net/%3Ftid%3D100PPA">
<embed src="./pagepeelads/big.swf?big=./pagepeelads/images/sixpack_500.gif&ad_url=http%3A//cymrusteve.6packquest.hop.clickbank.net/%3Ftid%3D100PPA" id="PagePeelBigEmbed" name="PagePeelBigObject" wmode="transparent" quality="high" flashvars="big=./pagepeelads/images/sixpack_500.gif&ad_url=http%3A//cymrusteve.6packquest.hop.clickbank.net/%3Ftid%3D100PPA" swliveconnect="true" allowscriptaccess="always" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" width="650" height="650">
</object>
</div>
