function PopupCentrer(page,largeur,hauteur,options){
  var top = (screen.height-hauteur)/2;
  var left = (screen.width-largeur)/2;
  window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}

function SERVER_HTTP_HOST(){   
    var url = window.location.href;   
    url = url.replace("http://", "");    
       
    var urlExplode = url.split("/");   
    var serverName = urlExplode[0];   
       
    serverName = 'http://'+serverName;
	return serverName;   
}

function lien(id){window.open(SERVER_HTTP_HOST()+'lien.php?id_ann='+id);}