var played = false;

function checkPlayState(nr, img) {
   var Player = document.getElementById('player_'+nr);
   
   if(Player.playState != 0 && Player.playState != 3) { played = true; }
   if (Player.playState==0 && played) {
         Player.style.display = 'none';
         document.getElementById('contentmovie_'+nr).innerHTML = '<img src="snippets/image.asp?file=../gfx_content/'+img+'&w=320" alt="img" />';
         return;
    } else {
         window.setTimeout("checkPlayState("+nr+", '"+img+"')",500);
    }
}