// Visializza e nasconde i sottomenu

function visualizzapagina(id) {
  if( document.getElementById && document.getElementsByTagName )
  {
    var menu = document.getElementById("pag_" + id);
    var menu_cont = document.getElementById('col3');
    var menus = menu_cont.getElementsByTagName('div');
    for(var i=1; i<=menus.length; i++)
    {
      currSez = document.getElementById("pag_" + i);
      if(currSez && i != id) {
        currSez.style.display = "none";
      } else if(currSez && i == id) {
        currSez.style.display = "";
      }
    }	
  }
  return false;
}