.welcomebx, 
#pagearea .container, 
#classeswrap, 
#section2 .container, 
#section3 .one_half, 
#section4 .container,
#section5 .container,
#section6 .container,
#section7 .container,
#section8 .container,
#section9 .container, 
#section10 .container{ 
visibility:hidden;
}