<HTML><HEAD>
<!--
-----------
Stop Button
-----------
-->
<SCRIPT LANGUAGE="JavaScript"><!-- hide from old browsers
/*
THE JAVASCRIPT COOKBOOK by Erica Sadun, webrx@mindspring.com
Copyright (c)2000 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.
*/
var str=""
var direction="left"
function setMessage()
{
msg = "YOUR MESSAGE HERE"
/* initialize the string to a bit from the left */
if (str == "") str = " "+msg
if (str.length < 20)
{
// leftmost: swing to the right
direction = "right"
str = " " + str
}
else if (str.length > 110)
{
// rightmost: swing to the left
direction = "left"
str = str.substring(3, str.length)
}
else if (direction == "left")
{
// nudge left -- make shorter
str = str.substring(2, str.length)
}
else
{
// nudge right -- make longer
str = " "+str
}
window.status = str
JSCTimeOutID = window.setTimeout('setMessage()',100)
}
<!-- done hiding --></SCRIPT></HEAD>
<BODY bgcolor="ffffff" link="0000ff" vlink="770077"
onload="JSCTimeOutID = window.setTimeout('setMessage()',500);">
<FONT COLOR="007777"><H1><IMG SRC="../GRAFX/UTENS.JPG" WIDTH=80 HEIGHT=50
ALIGN = LEFT>Marquee #6: The Stop Button</H1></FONT>
<BLOCKQUOTE><FONT COLOR="770000">
This script repeats the functionality of Marquee #2, with an
added "stop" button.
</FONT></BLOCKQUOTE>
<BR><BR>
<CENTER><FORM>
<INPUT TYPE="BUTTON" VALUE=" S T O P "
onClick="clearTimeout(JSCTimeOutID)"><p>
<INPUT TYPE="BUTTON" VALUE="Call setMessage() to Restart"
onClick="setMessage()"><p>
<!-- Recall that history.go(0) reloads a page -->
<INPUT TYPE="BUTTON" VALUE="Reload to Restart" onClick="history.go(0)">
</FORM></CENTER>
<BR><BR>
<FONT COLOR="007777"><H2>Discussion</H2></FONT>
<FONT SIZE=4>
Halt timeout-loops by calling <FONT COLOR="770000">clearTimeout</FONT>
on the current timeout process. In this example the onClick
event handler,
<FONT COLOR="770000">onClick="clearTimeout(JSCTimeOutID)"</FONT>
clears the pending event and prevents the
<FONT COLOR="770000">setMessage()</FONT> event from executing--and
hence from starting a new timeout.
</FONT>
<h5>Copyright ©1996 by Charles River Media, All Rights Reserved</h5>
</BODY>
</HTML>