function initmap() {
  if( document.getElementById( 'map' ) ) {
    loadMap()
  }
}

var inav = 0
function showinav( num ) {
  var id, el
  if( inav != num && inav != 0 )
  {
    id = 'div-inav' + inav
    el = document.getElementById( id )
    el.className='subnavoff'
  }
  if( num )
  {
    id = 'div-inav' + num
    el = document.getElementById( id )
    el.className='subnavon'
  }
  inav = num
}