html escribir variable de javascript

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Sara
28 Jul 2017
1<html>
2
3<head>
4</head>
5<script type="text/javascript">
6function calcula_resta() {
7  var numero1 = document.getElementById("numero1").value;
8  var numero2 = document.getElementById("numero2").value;
9  var resultado = (numero1 - numero2);
10  document.getElementById('lbResultado').innerHTML = resultado;
11}
12</script>
13
14<body>
15  <form>
16    <p>
17      <b>Calculadora Resta</b>
18      <br/><br/>
19    </p>
20    Numero1
21    <br/>
22    <input id="numero1" type="number" />
23    <br/><br/> Numero2
24    <br/>
25    <input id="numero2" type="number" />
26    <br/><br/>
27    <input type="button" value="Calcular" onclick="calcula_resta()" /><br/>
28  </form>
29  <div id="resultado">
30    <label id="lbResultado">test</label>
31  </div>
32</body>
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