<HTML><HEAD>
<!--
------------------------
Elementary Validation #2
------------------------
-->
<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.
*/
// Check for @ sign
function validate()
{
if ((document.forms[0].F1.value.length == 0) ||
(document.forms[0].F1.value.indexOf('@') < 0))
{
alert('You must enter an email address')
return false
}
else
return true
}
<!-- done hiding --></SCRIPT></HEAD>
<BODY bgcolor="ffffff" link="0000ff" vlink="770077"
onLoad="document.forms[0].F1.focus();document.forms[0].F1.select()">
<FONT COLOR="007777"><H1><IMG SRC="../GRAFX/UTENS.JPG" WIDTH=80 HEIGHT=50
ALIGN = LEFT>Validation #2: Simple Email Check</H1></FONT>
<BLOCKQUOTE>
<FONT COLOR="770000">
This script will not submit unless the text field contains an at-sign
(@).
</FONT>
<FORM onSubmit='return validate()'>
<INPUT TYPE='TEXT' NAME='F1'>
<INPUT TYPE='SUBMIT'>
</FORM>
</FONT></BLOCKQUOTE>
<FONT COLOR="007777"><H2>Discussion</H2></FONT>
<FONT SIZE=4>
This form's <FONT COLOR="770000">onSubmit</FONT> event
calls the function <FONT COLOR="770000">validate()</FONT>
which ensures that the text field contains an @ sign.
</FONT>
<FONT COLOR="770000"><PRE>
function validate()
{
if ((document.forms[0].F1.value.length == 0) ||
(document.forms[0].F1.value.indexOf('@') < 0))
{
alert('You must enter an email address')
return false
}
else
return true
}
</PRE></FONT>
<h5>Copyright ©1996 by Charles River Media, All Rights Reserved</h5>
</BODY>
</HTML>