</pre>
In this example the function is called multiple times, passing through arguments that are then used in the function to construct a string to bne displayed in the alert dialog. To achieve this without functions it would ne necessary to repeat the script in the function 3 times over in the body. Clearly placing the script ina function and re-using it over and over is a much more efficient approach.
Next we need to look at how a function might return a value.
<pre>
<html>
<head>
<title>A Simple JavaScript Function Example</title>
<script language="JavaScript" type="text/javascript">
function sayHello()
{
alert("Hello!");
}
</script>
</head>
<body>
== Returning a Value from a Function ==