|
/*
JavaScript Bible, Fourth Edition
by Danny Goodman
Publisher: John Wiley & Sons CopyRight 2001
ISBN: 0764533428
*/
<HTML>
<HEAD>
<TITLE>Beatle Picker</TITLE>
<SCRIPT LANGUAGE="JavaScript">
function processData(form) {
for (var i = 0; i < form.Beatles.length; i++) {
if (form.Beatles[i].checked) {
break
}
}
// assign values to variables for convenience
var beatle = form.Beatles[i].value
var song = form.song.value
alert("Checking whether " + song + " features " + beatle + "...")
}
function verifySong(entry) {
var song = entry.value
alert("Checking whether " + song + " is a Beatles tune...")
}
</SCRIPT>
</HEAD>
<BODY>
<FORM onSubmit="return false">
Choose your favorite Beatle:
<INPUT TYPE="radio" NAME="Beatles" VALUE="John Lennon" CHECKED>John
<INPUT TYPE="radio" NAME="Beatles" VALUE="Paul McCartney">Paul
<INPUT TYPE="radio" NAME="Beatles" VALUE="George Harrison">George
<INPUT TYPE="radio" NAME="Beatles" VALUE="Ringo Starr">Ringo<P>
Enter the name of your favorite Beatles song:<BR>
<INPUT TYPE="text" NAME="song" VALUE = "Eleanor Rigby" onChange="verifySong(this)"><P>
<INPUT TYPE="button" NAME="process" VALUE="Process Request..." onClick="processData(this.form)">
</FORM>
</BODY>
</HTML>
|
