function sendEvent(swf,typ,prm) { 
  thisMovie(swf).sendEvent(typ,prm); 
};
function getUpdate(typ,pr1,pr2,swf) {};
function thisMovie(swf) {
  if(navigator.appName.indexOf("Microsoft") != -1) {
    return window[swf];
  } else {
    return document[swf];
  }
};

function loadFile(swf,obj) { 
  thisMovie(swf).loadFile(obj); 
};

var currentTool = 'overview';
var currentPlaylist = 'overview';

var default_videos = new Array();
default_videos['overview']  = '/movies/overview/Using_Web_2_0.mov';
default_videos['rpassport'] = '/movies/rpassport/rpassport_overview.mov';
default_videos['rafl']		  = '/movies/rafl/Coursework_OCR.mov';
default_videos['rmap']       = '/movies/rmap/create_rmaps.mov';
default_videos['rweb'] 		= '/movies/rweb/Revision.flv';
default_videos['rcast'] 	= '/movies/rcast/create_rcasts.mov';
default_videos['rfeatures'] = '/movies/rcommunity/rcommunity.mov';

function setMediaPlaylist(playlist) {
	setImage(currentPlaylist,'/images/mc/'+currentPlaylist+'.png');
	setImage(playlist,'/images/mc/'+playlist+'_active.png');

	setDisplay(currentTool+'_holder','none');
	setDisplay(currentPlaylist+'_playlist','none');
	currentPlaylist = playlist;
	
	setDisplay(playlist+'_holder','');
	setDisplay(playlist+'_playlist','');
	currentTool = playlist;
	
	if(firstload == false) {
	  var url = "/mediacentre/switchrelated";
	  
	  // send ajax request
	  $.ajax({
	    type: "POST",
	    url: url,
	    data: {"related_list" : playlist, "video" : default_videos[playlist]},
	    success: function(data, status){
				
				$("#videowrapper").html(data);
	    },
	    error: function(xhr, textStatus, errorThrown){
	      alert("failed");
	    }
	  });
  }
  
  firstload = false;
  
  return false;
}

function setImage(id,source) {
	document.getElementById(id).src = source;
}

function setDisplay(id,status) {
	document.getElementById(id).style.display = status;
}

function setText(id,string) {
	document.getElementById(id).innerHTML = string;
}

function setBackground(id,bg) {
	document.getElementById(id).style.backgroundImage = 'url(/images/mc/'+bg+'_resources.gif)';
}

function hoverImage(id,source) {
	if(id != currentPlaylist) {
		document.getElementById(id).src = source;
	}
}