Does the site use any CSS hacks?
//default pop-under house ad url infinityads_enable_pop = true; infinityads_frequencyCap =-1; durl = ”; infinityads_layer_border_color = ”; infinityads_layer_ad_bg = ”; infinityads_layer_ad_link_color = ”; infinityads_layer_ad_text_color = ”; infinityads_text_link_bg = ”; infinityads_text_link_color = ”; infinityads_enable_text_link = false; online marketing Basically, hacks come down to personal choice, the amount of knowledge you have of workarounds, the specific design you are trying to achieve.