Simple conditional

Tests input for equality (==) with the number 9.

Enter a number, script checks for 9

<head>
	<title>if syntax</title>
  <script>
    function checkValue(){
      var val = document.getElementById("num").value;
      if (val == 9)
        alert("the number entered is 9");
    }
  </script>
</head>

<body>
<h3>Simple conditional</h3>
<p>Tests input for equality (==) with the number 9.</p>
<form onSubmit="checkValue();">
  <input type="text" id="num"> Enter a number, script checks for 9<br>
  <input type="submit">
</form>
</body>