function menu_set (view_menu)
{
  switch_view (view_menu, 'menuBarCenter', 3, false) ;
}




function view_and_hide (element_id)
{
   if (document.getElementById (element_id).style.display == "none") {
     document.getElementById (element_id).style.display = "block" ;
     if (document.getElementById (element_id+"_link"))
       document.getElementById (element_id+"_link").innerHTML = "ukryj szczegóły" ;
   }
   else {
     document.getElementById (element_id).style.display = "none" ;
     if (document.getElementById (element_id+"_link"))
       document.getElementById (element_id+"_link").innerHTML = "pokaż szczegóły" ;
   }
}



function switch_view (view_nr, target_id, switch_quantity, symbol)
{
  for (var a=1; a <= switch_quantity; a++) {
    if (a == view_nr) {
      document.getElementById (target_id+a).style.display = "block" ;
      if (symbol)    {
        document.getElementById (symbol+a).className = symbol+"Selected" ;     }
    }
    else {
      document.getElementById (target_id+a).style.display = "none" ;
      if (symbol)
        document.getElementById (symbol+a).className = symbol+"Unselected" ;
    }
  }
}



function switch_welcome (view_nr, switch_quantity_prime)
{
    switch_view (view_nr, "welcomeInfo", 4, 'welcomeBar') ;

    view_nr++ ;
    if (view_nr > 4)
      view_nr = 1 ;


    setTimeout("switch_welcome ("+view_nr+") ;", 10000) ;
}