function overUniverse(elem){
	elem.style.position="relative";
	elem.style.top="-40px";
}

function outUniverse(elem){
	elem.style.top="0px";
}

function toggleUnivLinks() {
	var elem = document.getElementById("universe_links_content");
	if (elem.style.display) {
		elem.style.display = '';
	} else {
		elem.style.display = 'none';
	}
}

function showUniverseImageOn(universeId){
	var elem = document.getElementById(universeId +"_on");
	if (elem != null) {
		elem.style.display = '';
	} 
	elem = document.getElementById(universeId +"_off");
	if (elem != null) {
		elem.style.display = 'none';
	} 
}

function showUniverseImageOff(universeId){
	var elem = document.getElementById(universeId +"_on");
	if (elem != null) {
		elem.style.display = 'none';
	} 
	elem = document.getElementById(universeId +"_off");
	if (elem != null) {
		elem.style.display = '';
	} 
}

var ck_items;
var ck_amount = new String();
ck_items = readCookie('CKITEMS');
ck_amount = readCookie('CKAMOUNT');
if(ck_items == null) {
	ck_items = 0;
}
else {
	ck_items = parseInt(ck_items);
}
if(ck_amount == null) {
	ck_amount = '0';
}

function readCookie(name) {
	var ret = null;
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) {
			ret = unescape(c.substring(nameEQ.length,c.length));
			break;
		}
	}		
	return ret;
}

function getRandomValue(numBlock){
	return Math.ceil(Math.random()*numBlock);
}

function displayRandomDiv(divName, numBlock){
	if (numBlock > 1 ){
		var elem1 = document.getElementById(divName + "1");
		if (elem1){
			elem1.style.display="none";
		} 
	}
	var chosen = getRandomValue(numBlock);
	var elem = document.getElementById(divName + chosen);
	if (elem){
		elem.style.display="";
	} 
}

function trim(str){
	return str.replace(/^\s*|\s*$/g,"");
}

// fonction pour ouvrir une popup : utilise dans les pages de contenus
function PopUp(pURL,pName,pFeatures) {
  var hauteur = 0;
  var largeur = 0;
  var wParam = pFeatures.toLowerCase().split(",");
  pFeatures = "";

  for (var i=0; i<wParam.length; i++) {
  	var wCouple = wParam[i].split("=");  	
  	if (wCouple.length == 2) {
	  	if (wCouple[0] == "height") {
  			hauteur = wCouple[1];
  			pFeatures += wParam[i] + ", ";
  		} else if (wCouple[0] == "width") {
  			largeur = wCouple[1];
  			pFeatures += wParam[i] + ", ";  		
  		} else if (wCouple[0] != "top" && wCouple[0] != "left") {
  			pFeatures += wParam[i] + ", "; 
  		}
  	}
  } 
  var top=(screen.height-hauteur)/2;
  var left=(screen.width-largeur)/2;
  pFeatures = "top="+top+",left="+left+"," + pFeatures;
  pWin = window.open(pURL, pName, pFeatures);
  //pWin = window.open( pURL, pName, pFeatures );
  pWin.focus();
}

// fonction pour retourner a la page precedente : utilise dans les pages de contenus
function GoBack() {
	if ( document.referrer ) document.location.href = document.referrer;
	else history.back();
}