Jquery mobile problème $.mobile.changePage

$(document).ready( function () { 
	$("#connexionForm").submit( function() {			 
		$.ajax({ 
		   type: "POST", 
		   url: "login.php", 
		   data: "login="+$("#login").val()+"&password="+$("#password").val(), 
		   success: function(msg){ // 
				if(msg==1) 
				{
					$.mobile.changePage( "derniersFilms.php", {
						transition: "flow",
						role: "page",
						back : true,
						reverse: false,
						changeHash: true
					});
				}			

				else if(msg==0)	
				{
					$.mobile.changePage( "loginError.html", {
						transition: "none",
						role: "dialog",
						reverse: true,
						changeHash: true
					});
				}
		   }
		});
		return false; 
	});
});