Sample JavaScript Programs

Sample JavaScript Programs

by Tom

Sample #1:
To Computer the Square Root of a Number:
     Notes:

All Program names are case sensitive

Programmer-supplied (ie arbitrary) names begin with "Toms..."
eg TomsSqrtPgm
      TomsSqrtResult.value
      TomsNumIn
      TomsSqrtCalc

All other programming names are keywords
       eg function, form, value, input, type, name, size, button, document, onClick, etc.
       eg "text",
       eg Math.sqrt

The <p> .. </p> tags were automatically insert by FrontPage

Definitions:
       A "form" is a window (.. is a program ..) which has an associated "value"
       A "object" is for example, "input", .. which has a "value"
       A "function" is a "method"


<html>
<head>
<title>Sample: Tom's Square Root Program</title>

<script language="JavaScript">
function TomsSqrtPgm(form) {
form.TomsSqrtResult.value = Math.sqrt(form.TomsNumIn.value); }
</script>
</head>

<body>
<h2>Tom's SQRT Calculator</h2>

<form name="TomsSqrtCalc">
<p>Enter a Number: <input type="text" name="TomsNumIn" value size="7">
<input type="button" value="Click for Ans:" onClick="TomsSqrtPgm(document.TomsSqrtCalc">
<input type="text" name="TomsSqrtResult" value size="7"> </p>
</form>

</body>
</html>

Try It !