var  menuselect;

function afficheId(baliseId) 
{
	if(menuselect)	cacheId(menuselect);
	
	afficheDIV('specialeffect');
	
	if (document.getElementById && document.getElementById(baliseId) != null) 
	{
	    document.getElementById(baliseId).style.visibility='visible';
	    document.getElementById(baliseId).style.display='block';
	    menuselect = baliseId;
	}
}

function cacheId(baliseId) 
{
		cacheDIV('specialeffect');
  if (document.getElementById && document.getElementById(baliseId) != null) 
    {
    document.getElementById(baliseId).style.visibility='hidden';
    document.getElementById(baliseId).style.display='none';
    }
}



function afficheDIV(baliseId) 
{
	
	if (document.getElementById && document.getElementById(baliseId) != null) 
	{
	    document.getElementById(baliseId).style.visibility='visible';
	    document.getElementById(baliseId).style.display='block';

	}
}

function cacheDIV(baliseId) 
{
  if (document.getElementById && document.getElementById(baliseId) != null) 
    {
    document.getElementById(baliseId).style.visibility='hidden';
    document.getElementById(baliseId).style.display='none';
    }
}


function changeActu(param) {
	
	
		var xhr_object = null;
		
		if(window.XMLHttpRequest) // Firefox
			xhr_object = new XMLHttpRequest();
		else if(window.ActiveXObject) // Internet Explorer
			xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
		else { // XMLHttpRequest non supporté par le navigateur
			alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");
		return;
		}		
		
		if(param) {	
			data = param;
		} else {
			data = "";	
		}
		

		filename = "ajax_actu.php";
		
			xhr_object.open("POST", filename, true);
			xhr_object.onreadystatechange = function() {   
				if(xhr_object.readyState == 4) {
					
					var d = document.getElementById("contenu");
					d.innerHTML =xhr_object.responseText;

	   
				}
			}  
	 
		
			xhr_object.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
			xhr_object.send(data);
}


function changeContenu(page,parametres) {
		
		if(menuselect)	cacheId(menuselect);

	
		var xhr_object = null;
		
		if(window.XMLHttpRequest) // Firefox
			xhr_object = new XMLHttpRequest();
		else if(window.ActiveXObject) // Internet Explorer
			xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
		else { // XMLHttpRequest non supporté par le navigateur
			alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");
		return;
		}		
		
		if(parametres) { data = parametres; }
		else { data = ""; }
		

		filename = "ajax_"+page+".php";
		
			xhr_object.open("POST", filename, true);
			xhr_object.onreadystatechange = function() {   
				if(xhr_object.readyState == 4) {
					
					var d = document.getElementById("contenu");
					d.innerHTML =xhr_object.responseText;
					afficheDIV('contenu');

	   
				}
			}  
	 
		
			xhr_object.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
			xhr_object.send(data);
}


function changeContenuBigOne(page,parametres) {
		
		afficheDIV('bigone');
	
		var xhr_object = null;
		
		if(window.XMLHttpRequest) // Firefox
			xhr_object = new XMLHttpRequest();
		else if(window.ActiveXObject) // Internet Explorer
			xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
		else { // XMLHttpRequest non supporté par le navigateur
			alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");
		return;
		}		
		
		if(parametres) { data = parametres; }
		else { data = ""; }
		

		filename = "ajax_"+page+".php";
		
			xhr_object.open("POST", filename, true);
			xhr_object.onreadystatechange = function() {   
				if(xhr_object.readyState == 4) {
					
					var d = document.getElementById("contenubigone");
					d.innerHTML =xhr_object.responseText;

	   
				}
			}  
			xhr_object.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
			xhr_object.send(data);
}