var timerlen = 5;
var slideAniLen = 800;
var timerID = new Array();
var startTime = new Array();
var obj = new Array();
var endHeight = new Array();
var moving = new Array();
var dir = new Array();

function slidedown(objname) {
	var expirecookie = new Date();
	var intwentyfourhours = expirecookie.getTime() + 86400000;
	expirecookie.setTime(intwentyfourhours);
	document.cookie =  "s=up; expires=" + expirecookie.toGMTString();
	if (moving[objname]) {
		return;
  }
  if (document.getElementById(objname).style.display != "none") {
  	return;
  }

  moving[objname] = true;
  dir[objname] = "down";
  setInnerHTML(document.getElementById("juke"), "Cacher le Jukebox MP3");
  startslide(objname);
}

function slideup(objname) {
	var expirecookie = new Date();
	var intwentyfourhours = expirecookie.getTime() + 86400000;
	expirecookie.setTime(intwentyfourhours);
	document.cookie =  "s=down; expires=" + expirecookie.toGMTString();

	if (moving[objname]) {
		return;
	}

	if (document.getElementById(objname).style.display == "none") {
		return;
	}

	moving[objname] = true;
	dir[objname] = "up";
	setInnerHTML(document.getElementById("juke"), "Afficher le Jukebox MP3");
	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]);

	return;
}

function toggleSlide(objname) {
	if(document.getElementById(objname).style.display == "none") {
		// div is hidden, so let's slide down
    slidedown(objname);
    window.onDomReady(startGallery);
  } else {
  	// div is not hidden, so slide up
    slideup(objname);
    window.onDomReady(startGallery);
  }
}