var menu_href = new Array();
var menu_img_dir;
var menu_img = new Array();
var menu_img_clicked = new Array();
var menu_id = new Array();
var menu_position_top = new Array();
var menu_position_left = new Array();
var menu_items;

function build_menu(first, last)
{
   if(first<1 || last>menu_items) alert('You put incorect value in function build_menu !');
   for( var i=first; i<=last; i++)
   {
      document.write('<a id='+ menu_id[i] +'a    href=\"' + menu_href[i] + '\">');
      document.write('<img id='+ menu_id[i] +'   src=\"' + menu_img_dir + menu_img[i] + '\" style=\"display:none\; position:relative\; left:' + menu_position_left[i]+ '\; top:' + menu_position_top[i] + '\;\"      onmousedown=\"open_menu(\''+menu_id[i] +'clicked\')\" onmouseout=\"close_menu(\''+menu_id[i]+'\')\"    border=0/>');
      document.write('<img id='+ menu_id[i] +'clicked   src=\"' + menu_img_dir + menu_img_clicked[i] + '\" style=\"display:none\; position:relative\; left:' + menu_position_left[i]+ '\; top:' + menu_position_top[i] + '\;\"      onmouseout=\"close_menu(\''+menu_id[i]+'clicked\')\"    border=0/>');
      document.write('</a>');
   }
}


function close_menu( nazwa )
{
   elem = document.getElementById( nazwa );
   elem.style.display = 'none';
}


function open_menu( nazwa )
{
   for(var i=1; i<=menu_items; i++) 
      if( nazwa != menu_id[i])
      {
         elem = document.getElementById( menu_id[i] );
         if( elem ) elem.style.display = 'none';
      }
   elem = document.getElementById( nazwa );
   elem.style.display = 'block';
}