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Hello World #2: Using a Function to Say Hello
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<SCRIPT LANGUAGE="JavaScript"><!-- hide from old browsers
/*
THE JAVASCRIPT COOKBOOK by Erica Sadun, webrx@mindspring.com
Copyright (c)1998 by Charles River Media. All Rights Reserved.
This applet can only be re-used or modifed by license holders of the
JavaScript Cookbook CD-ROM. Credit must be given in the source
code and this copyright notice must be maintained. If you do
not hold a license to the JavaScript Cookbook, you may NOT
duplicate or modify this code for your own use.
Use at your own risk. No warranty is given or implied of the suitability
of this applet for any specific application. Neither Erica Sadun nor
Charles River Media will be held responsible for any unwanted effects
due to the use of this applet or any derivative.
*/
function hello_world()
{
document.write("<b>Hello World!</b><p>")
}
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<FONT COLOR="007777"><H1><IMG SRC="../GRAFX/UTENS.JPG" WIDTH=80 HEIGHT=50
ALIGN = LEFT>Communications 102</H1></FONT>
<BLOCKQUOTE>
<FONT COLOR="770000">
I will say "Hello World" in bold print just below this line
by calling a JavaScript Function.
</FONT>
</BLOCKQUOTE>
<SCRIPT>
hello_world()
</SCRIPT>
<FONT COLOR="007777"><H2>Discussion</H2></FONT>
<FONT SIZE=4>
In this second program, you see how to call a
JavaScript function from HTML. This script calls
the function <font color="770000">hello_world</font>
without any parameters. This function is declared
in the HTML head, as are most JavaScript functions. This
helps separate JavaScript functionality from document content
and makes your HTML easier to understand and maintain.
<h3>The hello_world() function</h3>
<font color="770000" size=3><pre><null
>function hello_world(){<br><null
> document.write("<b>Hello World!</b><p>")<br><null
>}<br>
</pre></font>
<h3>The calling HTML script</h3>
<font color="770000" size=3><pre><null
><SCRIPT LANGUAGE="JavaScript"><br><null
> hello_world()<br><null
></SCRIPT>
</pre></font>
</FONT>
<h5>Copyright ©1996 by Charles River Media, All Rights Reserved</h5>
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