var site = '';
function handleResponseliens() {
	if(http.readyState == 4){
		var response = http.responseText;
	}
}
function visite_site(id){
	if(site != id)
	{
		http.open('get','clic.php?site='+id);
		http.onreadystatechange = handleResponseliens ;
		http.send(null);
		site = id;
	}
}