function Ajax(){
	var letemps=new Date();
	var letheme;
	var xmlHttp;
	try{	
		xmlHttp=new XMLHttpRequest();// Firefox, Opera 8.0+, Safari
	}
	catch (e){
		try{
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); // Internet Explorer
		}
		catch (e){
			try{
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e){
				alert("No AJAX!?");
				return false;
			}
		}
	}

	xmlHttp.onreadystatechange=function(){
		if(xmlHttp.readyState==4){
			document.getElementById('bloc_idées').innerHTML=xmlHttp.responseText;
			//setTimeout('Ajax()',10000);
		}
	}
	letheme = document.getElementById("sélecteur_de_thème").value;
	xmlHttp.open("GET",letheme+".html?time="+letemps.getTime(),true);
	
	for (var elemid in state)
	{
		state[elemid] = 'none';
	}
	
	xmlHttp.send(null);
}

window.onload=function(){
	//setTimeout('Ajax()',10000);
	document.getElementById('bloc_idées').innerHTML="aaaaaa";
	Ajax();
}