CODE
<style>
.clearfix div h1, .clearfix div div select, .clearfix div form, .clearfix td div ul { display:none!important; }
.clearfix td { background:none; }
.clearfix td div { position:relative; top:-160px; }
.clearfix td div div { position:relative; top:80px; }
</style>
this works most of the time, depending on what type of advertisement is being displayed. i've noticed that if it's a flash-based advertisement, it'll always work. if it's a javascript text link advertisement, it works about 70% of the time (the other 30% shoots the advertisement above the browser so you can't see it).