//var qString = window.location.search;
var lastTrailer = 'none';

function soundOnOff(elem) {
  if(elem.innerHTML.indexOf('OFF') > -1) {
    elem.innerHTML = 'BLACK & FUNKY MUSIC ON';
    top.frames[1].location.href='player.php?mute=on';
  }
  else {
    elem.innerHTML = 'BLACK & FUNKY MUSIC OFF';
    top.frames[1].location.href='player.php?mute=off';
  }
}

function trailerOnOff(elem, file) {
  // on-off
  if(lastTrailer == elem) {
    // trailer is off, turn on
    if((top.frames[1].location.search == '?file=off') || (top.frames[1].location.search == '')) {
      elem.innerHTML = 'Stop';
      top.frames[1].location.href='player.php?file='+file+'&loop=1';
    }
    // trailer is on, turn off
    else {
      elem.innerHTML = 'Play';
      top.frames[1].location.href='player.php?file=';
    }
  }
  // switch trailer
  else {
    if(lastTrailer != 'none') {
      lastTrailer.innerHTML = 'Play';
    }
    lastTrailer = elem;
  
    elem.innerHTML = 'Stop';
    top.frames[1].location.href='player.php?file='+file+'&loop=1';
  }
}