function zmen(co, naco) {
  if (aktivne != co) {
    document.getElementById('img'+co).src=naco; 
  }
 }
 
 function start_menu() {;
  for (i=1; i<=9; i++) {
   document.getElementById('img'+i).useMap='#m_'+pole_menu[i];  
  }
 }
 
 function iframe_null (kam) {
  for (i=1; i<=9; i++) {
   document.getElementById('a'+i).onmouseover='';
   document.getElementById('a'+i).onmouseout='';
   document.getElementById('img'+i).useMap='';   
  }
  if (document.getElementById("ifr")) document.getElementById("ifr").src=""; 
  document.odosli.id.value=kam;
  document.odosli.submit();
  return false;
 }