I use DPI script (http://www.piceye.com/), I use geopop advertising from adultadworld, it's layered ad. The problem is the layered ad won't appear in the center. It works fine in Firefox and Chrome but only IE. Until I change doctype from <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> to <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> Now it also works fine with IE. Please tell me, is there any problem since the script comes with the first doctype