/*
	Taken from: http://www.harrymaugans.com/2007/03/06/how-to-create-an-animated-sliding-collapsible-div-with-javascript-and-css/
	Edited by: Andrew Scott <andrew.scott@zu.com>
*/

var timerlen = 5;
var slideAniLen = 500;

var timerID = new Array();
var startTime = new Array();
var obj = new Array();
var endHeight = new Array();
var moving = new Array();
var dir = new Array();
var project = new Array();

function slidedown(objname){
  if(moving[objname])
    return;
 
  if(document.getElementById(objname).style.display != "none")
    return; // cannot slide down something that is already visible
 
  moving[objname] = true;
  dir[objname] = "down";
  startslide(objname);
}
 
function slideup(objname){
  if(moving[objname])
    return;
 
  if(document.getElementById(objname).style.display == "none")
    return; // cannot slide up something that is already hidden
 
  moving[objname] = true;
  dir[objname] = "up";
  startslide(objname);
}

function startslide(objname){
  obj[objname] = document.getElementById(objname);
 
  endHeight[objname] = parseInt(obj[objname].style.height);
  startTime[objname] = (new Date()).getTime();

 if(dir[objname] == "down")
    obj[objname].style.height = "1px";
 
  obj[objname].style.display = "block";
 
  timerID[objname] = setInterval('slidetick(\'' + objname + '\');',timerlen);
}

function slidetick(objname){
  var elapsed = (new Date()).getTime() - startTime[objname];
 
  if (elapsed > slideAniLen)
    endSlide(objname)
  else {
   	var d = Math.round(elapsed / slideAniLen * endHeight[objname]);
   if(dir[objname] == "up")
      d = endHeight[objname] - d;

	obj[objname].style.height = d + "px";
  }
 
  return;
}

function endSlide(objname){
  clearInterval(timerID[objname]);
 
  if(dir[objname] == "up" )
    obj[objname].style.display = "none";
 
  obj[objname].style.height = endHeight[objname] + "px";
 
  delete(moving[objname]);
  delete(timerID[objname]);
  delete(startTime[objname]);
  delete(endHeight[objname]);
  delete(obj[objname]);
  delete(dir[objname]);
  
    if( loaded && objname == 'filmstrip' )
  		slidedown('filmstrip');
 
  return;
}

function show(objname)
{
	if(moving[objname])
    	return;
 
  moving[objname] = true;
  dir[objname] = "show";
  startmove(objname);
}

function hide(objname)
{
	if(moving[objname])
    	return;
 
  moving[objname] = true;
  dir[objname] = "hide";
  startmove(objname);
}

function startmove(objname){
  obj[objname] = document.getElementById(objname);
 
  endHeight[objname] = parseInt(obj[objname].style.height);
  startTime[objname] = (new Date()).getTime();
 
  timerID[objname] = setInterval('movetick(\'' + objname + '\');',timerlen);
}

function movetick(objname){
  var elapsed = (new Date()).getTime() - startTime[objname];
 
  if (elapsed > slideAniLen)
    endmove(objname)
  else {
   	var d = Math.round(elapsed / slideAniLen * endHeight[objname]);
   if(dir[objname] == "show")
      d = endHeight[objname] - d;
	  
	  obj[objname].style.top = d + "px";
  }
 
  return;
}

function endmove(objname){
if( dir[objname] == "hide" )
	obj[objname].style.top = obj[objname].style.height;
  clearInterval(timerID[objname]);
 if( dir[objname] == "hide" && (loadedproject || objname == "filmstrip")  )
 {
	  delete(moving[objname]);
	  delete(timerID[objname]);
	  delete(startTime[objname]);
	  delete(endHeight[objname]);
	  delete(obj[objname]);
	  delete(dir[objname]);
   	  show(objname);
 }
 else
 {
	 delete(moving[objname]);
	  delete(timerID[objname]);
	  delete(startTime[objname]);
	  delete(endHeight[objname]);
	  delete(obj[objname]);
	  delete(dir[objname]);
 }
   
  return;
}
var both = false;
function hideboth()
{
	both = true;
	hide('project');	
}