function changeVideo(object, filename, player){
    var objecttochange = object;
    var playertochange = player;
    var newvideo = '/videos/' + filename + '.mp4';
    var newpreview = '/videos/screens_gross/' + filename + '.jpg';
    
    object.addParam('flashvars', 'skin=/vplayer/skin.zip&playlist=false&controlbar=over&dock=false&file=' + newvideo + '&image=' + newpreview + '&playerready=playerReady&bufferlength=10&type=video');
    object.addParam('allowfullscreen', 'true');
    object.addParam('allowscriptaccess', 'always');
    object.addVariable('id', player);
    object.addVariable('javascriptid', 'player1');
    object.addVariable('enablejs','true');
    object.write(playertochange);
}

function playerReady(obj){
    // instantiate the player for script access
    player = document.getElementById(obj['id']);
};