var changeAnnonceTimer;

function changeAnnonceFct()
	{
	var Elts = getElementsByOneClassName(document.getElementById("AnnoncesRecentes"), 'div', 'Annonce');
	var EltsLength = Elts.length;
	
	if (EltsLength > 1)
	   {
		var foundDisplay = false;
		var EltIDtoDisplay = '';
		
	   for (var i=0; i < EltsLength; i++)
	   	   {
		   var EltID = Elts[i].id;
		   if (EltIDtoDisplay == '') EltIDtoDisplay = EltID;
		   
		   var Elt = document.getElementById(EltID);
		   //alert(Elt.style.display);
		   if ((Elt.style.display != 'none') || (Elt.style.display == ''))
		   	  {
			  foundDisplay = true;
			  Elt.style.display = 'none';
			  }
		   else if (foundDisplay == true)
		   	  {
			  EltIDtoDisplay = EltID;
			  break;
			  }
		   }
		   
	   if (EltIDtoDisplay != '')
	   	  {
		  displayProgressiveElt(EltIDtoDisplay);
		  }
	   }
	
	window.status = 'found ' + EltIDtoDisplay + ' annonce';
	}
	
function displayProgressiveElt(EltID)
	{
	var Elt = document.getElementById(EltID);
	var OpacityStep = 0;
	setOpacity(Elt, OpacityStep);
	Elt.style.display = 'block';
	
	var displayProgressiveTimer;
	var increaseTransparency = function ()
		{
		OpacityStep++;
		setOpacity(Elt, OpacityStep);
		
		if (OpacityStep >= 10)
		   {
		   clearInterval(displayProgressiveTimer);
		   }
		}
	increaseTransparency();
	displayProgressiveTimer = setInterval(increaseTransparency,100);
	}
	
function setOpacity(testObj, value)
	{
	testObj.style.opacity = ""+(value/10);
	//testObj.style.filter = 'alpha\(opacity=' + 0.1 + '\)';
	}

	
changeAnnonceTimer = setInterval(changeAnnonceFct,4500);