$.ajax({
			type: "POST",
			url: "login.php",
			data: {
					username: $("#username").val(),
					password: $("#password").val()
			}
		}).done(function(r){
				switch(r){
						case "bad_login":
								alert("Bad login!");
								break;
						case "success":
                                window.location.assign("index.html");
								break;
						default:
								window.location.assign("index.html");
								break;
				}
		}).fail(function(){
				alert("Error!");
		});