Test

Just trying this out againW

HTML

<script src="https://static.firebase.com/v0/firebase.js"></script>
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<div>
Username: 
<br>
<input type="text" id="Textbox1">
<br>
Name: 
<br>
<input type="text" id="Textbox2">
<br>
Contraseña:
<br>
<input type="text" id="Textbox3">
<br>
Date: 
<br>
<input type="text" id="datepicker"class="special">
<br>

<table class=buttons>
  <tr>
    <td><button id=mybutton onclick=myfunction()>Registrate </button>
    <td><button id=mybutton onclick=testfunction()>Login  </button>
</table>

<div id="div1"></div>
</div>


<link rel="stylesheet" type="text/css" href="//fonts.googleapis.com/css?family=Lato" />

CSS

input{
  font-family: Lato;
  background-color: #8ddaff;
  width: 75%;
  border-style:none;
  background-color:#ffffff;
}
div {  
  font-family: Lato;
  background-color: #8ddaff;
  text-align: center;
}
button {  
  font-family: Lato;
  background-color: #8ddaff;
  background-color: #e7e7e7;
  width: 100%;
}
table {   
  font-family: Lato;  
  background-color: #8ddaff;
  width: 75%;
  table-layout: fixed;
  border-collapse: collapse;
  background-color: #8ddaff;
  text-align: center;
  margin-left:auto; 
  margin-right:auto;
}
input.special {  
  font-family: Lato;
  background-color: white;
}

JavaScript

$( function() {
    $( "#datepicker" ).datepicker();
  } );

var firebasetable = new Firebase("https://wishlist-firebase.firebaseio.com/Applicacion/")

function testfunction(){ 
    var users = "https://wishlist-firebase.firebaseio.com/Applicacion/Testeando/"+textarea1;
users.on("value", function(data) {
	var name = data.val().Username;
	var city = data.val().Nombre;
	var position = data.val().Contraseña;
	var me = "Username:"+name+" Password:"+city+" Real name: "+position;
	var div1 = document.getElementById('div1');
	div1.innerHTML=me;
  })
}        


function myfunction() {
 		var textarea1 =  document.getElementById("Textbox1").value;
   	var textarea2 = document.getElementById("Textbox2").value;
   	var textarea3 = document.getElementById("Textbox3").value;
   	var textarea4 = document.getElementById("datepicker").value;
    var Spacefiller = '"'
    var Spacefiller2 = '\"'
    var users = "https://wishlist-firebase.firebaseio.com/Applicacion/Users/"+textarea1;
    var valuearea1 = Spacefiller.concat(textarea1, Spacefiller2);
    var valuearea2 = Spacefiller.concat(textarea2, Spacefiller2);
    var valuearea3 = Spacefiller.concat(textarea3, Spacefiller2);
    var valuearea99 = textarea4.replace(/\//g, "\\/"  );
    var valuearea98 = valuearea99.replace(/\/0/g, "/"  );
    var valuearea97 = valuearea98.replace(/"0/g, '""'  );
    var valuearea4 = Spacefiller.concat(valuearea97, Spacefiller2);
  
    var firebasetable = new Firebase(users)
	firebasetable.set({
		Username: valuearea1,
    Nombre: valuearea2, 
		Contraseña: valuearea3,
    Cumpleaños: valuearea4,
    });
  var wishlists = "https://wishlist-firebase.firebaseio.com/Applicacion/Wishlists/" +textarea1;
  var wishlist = new Firebase(wishlists)
  	wishlist.set({
		CantidadDeseos: '\"0\"',});

  var me = "Username:"+valuearea1+" Password:"+valuearea2+" Real name: "+valuearea3+" Date: "+valuearea4;
	var div1 = document.getElementById('div1');
	div1.innerHTML=me
}