function checkkey(event)
{
        var event = event ? event : window.event; 
        var klawisz = event.keyCode ? event.keyCode : event.charCode;                                                
        if(timerhandler != null && (klawisz == 38 || klawisz == 40) )
{
          if (klawisz == 40) 
              suggest_position++; 
          else if (suggest_position > 1) 
              suggest_position-- 
          else
  {
              while (document.getElementById(++suggest_position) != null) 
                     continue; 
              suggest_position--;
          }; 
          if (document.getElementById(suggest_position) == null) 
              suggest_position = 1;
          deselectall(zrodlo, suggest_position);
          return false;
        }
else if (timerhandler != null && klawisz == 13)
{
          end_suggest(zrodlo, suggest_position);
          return false;
        }
else if (timerhandler != null)
{
          suggest_position = 0;
          document.getElementById(zrodlo).focus();
          return true;
        }
}

function deselectall(zrodlo, id_diva)
{
         var zrodlo;   
         var id_diva;
         document.getElementById(zrodlo).blur();
         for (var i=1 ; document.getElementById(i) != null ; i++) 
             document.getElementById(i).style.background = 'white';
         suggest_position=id_diva;
         document.getElementById(suggest_position).style.background='silver'; 
}
// ie i n
if (navigator.appName == 'Microsoft Internet Explorer' || navigator.appName == 'Netscape')
                document.onkeydown=checkkey;
// o
else
                document.onkeypress=checkkey;