We have been batting around the best way to control session management between us and one of our clients. The client is the main host and we are acting as a vendor for part of the site. <BR><BR>We are trying to figure out the best way to keep the two sites in sync so that we don&#039t time out each other when the user is moving between both of us. <BR><BR>We thought about cookies, but that could cause a problem if the user&#039s browser does not allow third party cookies to be set.<BR><BR>If there is a solid solution that is bullet proof?