<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
REMOVE THIS<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
this thread. There is a javascript solution to this problem which is caused by IE being rubbish and not catering for percentage values in height attribute of an object (or an iframe). This means you can still have standards compliant aspx page (ie not remove the doctype).