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<!--
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Hello World #8: Saying Hello using a prompt.
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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 doHello(msg)
{
var ans = prompt(""+msg,"Hello");
if (!ans) alert("You pressed cancel.")
else if (ans.toUpperCase() == "HELLO") alert("You said hello!")
else alert("You didn't say hello...")
}
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<BODY bgcolor="ffffff" link="0000ff" vlink="770077">
<FONT COLOR="007777"><H1><IMG SRC="../GRAFX/UTENS.JPG" WIDTH=80 HEIGHT=50
ALIGN = LEFT>Communications 108</H1></FONT>
<BLOCKQUOTE><FONT COLOR="770000">
After the reader presses the below button, I'll
pop prompt the user to say hello.
</FONT>
<FORM>
<INPUT
TYPE="button"
VALUE=" Say Hello to JavaScript "
onClick="doHello('Say Hello to Me')"
><p>
</FORM></BLOCKQUOTE>
<FONT COLOR="007777"><H2>Discussion</H2></FONT>
<FONT SIZE=4>
This eighth "hello" program asks the user for
a response by exercising the
<FONT COLOR="770000">prompt()</FONT> function.
This script converts the response to upper case to
compare against the string "HELLO". The script
notifies the user with this comparison.<p>
<h3>Creating a Pop-up Window</h3>
<font color="770000"><PRE>
function doHello(msg)
{
var ans = prompt(""+msg,"Hello");
if (!ans) alert("You pressed cancel.")
else if (ans.toUpperCase() == "HELLO") alert("You said hello!")
else alert("You didn't say hello...")
}
</PRE></FONT>
<h5>Copyright ©1996 by Charles River Media, All Rights Reserved</h5>
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