escondo el boton

formulario.html

@@ -135,8 +135,10 @@
 			var elems = document.querySelectorAll('input'), i;
 			var spinner = document.getElementById("spinner");
 			var bigbox = humane.create({baseCls: 'humane-original', timeout: 150})
+			var button = document.getElementById("button");
 
-			document.getElementById("button").onclick = send;
+			button.style.display="none";
+			button.onclick = send;
 			bigbox.error = bigbox.spawn({addnCls: 'humane-bigbox-error'})
 
 			function updateModel(){
@@ -173,6 +175,7 @@
 				  	    	user = data;
 							user.hash=params["hash"];
 				 			updateModel();
+							button.style.display="block";
 				  	  		break;
 				  		case 401:
 							bigbox.error(data.mensaje, { timeout: 5000, clickToClose: true });