PALS3004: Web Programming Demo 5-1

<html>
<head>
<title>PALS3004: Web Programming Demo 5-1</title>
<script>
function button1click() {
  document.getElementById("span1").innerHTML = 
    eval(document.getElementById("textbox1").value);
}
</script>
</head>
<body>
  <h2>Demo 5-1: Javascript Expression Evaluation</h2>
  <p><input type="text" id="textbox1" size="32" > = <span id="span1"></span>
  <p><button onclick="button1click()">Evaluate</button>
</body>
</html>