... <com:TPanel ID="blockMenu"> <com:TContentPlaceHolder ID="cphPnlMenu" /> </com:TPanel> <com:TPanel ID="blockContent"> <com:TContentPlaceHolder ID="cphPnlMain" /> </com:TPanel> <com:TPanel ID="blockLogin"> <com:TContentPlaceHolder ID="cphPnlLogin" /> </com:TPanel> ...