PALS3004: Web Programming Demo 6-1

<html>
<head>
<title>PALS3004: Web Programming Demo 6-1</title>
<script>
function button1click() {
  var num=parseInt(document.getElementById("textbox1").value);
  var txt="";
  if (isNaN(num))
    txt = txt + "Not a number<br>";
  else if (num == 0)
    txt = txt + "Zero<br>"
  else {
    if (num < 0)
      txt = txt + "Negative<br>";
    else
      txt = txt + "Positive<br>";
    if ((num % 2)==0)
      txt = txt + "Even<br>";
    else
      txt = txt + "Odd<br>";
  }
  document.getElementById("span1").innerHTML = txt;
}
</script>
</head>
<body>
  <h2>Demo 6-1: Demonstrate If-Else Statements</h2>

  <p>Number: <input type="text" id="textbox1" size="32" >
  <p><button id="button1" onclick="button1click()">Analyze</button>
  <p><span id="span1"></span>
  
</body>
</html>
Demo 6-1: Demonstrate If-Else Statements

Number: