Passing a Form Object and Form Element to Functions

 
<HTML>
<HEAD>
<TITLE>Beatle Picker</TITLE>
<SCRIPT LANGUAGE="JavaScript">
function processData(form) {
    for (var i = 0; i < form.CheckBoxes.length; i++) {
        if (form.CheckBoxes[i].checked) {
            break;
        }
    }
    var beatle = form.CheckBoxes[i].value;
    var song = form.song.value;
    alert(song + " " + beatle);
}
function verifySong(entry) {
    var song = entry.value;
    alert(song);
}
</SCRIPT>
</HEAD>
<BODY>
<FORM onSubmit="return false">
Choose your favorite Beatle:
<INPUT TYPE="radio" NAME="CheckBoxes" VALUE="J" CHECKED>J
<INPUT TYPE="radio" NAME="CheckBoxes" VALUE="P">P
<INPUT TYPE="radio" NAME="CheckBoxes" VALUE="G">G
<INPUT TYPE="radio" NAME="CheckBoxes" VALUE="R">R<P>
Enter the name of your favorite song:<BR>
<INPUT TYPE="text" NAME="song" VALUE = "test" onChange="verifySong(this)"><P>
<INPUT TYPE="button" NAME="process" VALUE="Process Request..." onClick="processData(this.form)">
</FORM>
</BODY>
</HTML>

1.	Adjusting a CGI Submission Action
2.	Button Objects: Submit, Reset, and Button
3.	Checking Elements on a Form
4.	Submitting Forms to the Server
5.	Variables in Hidden form
6.	Creating an Example Form for User Feedback
7.	Accessing the Elements of a Form
8.	Using the form.elements Array
9.	form.reset() and form.submit() Methods
10.	The onReset and onSubmit Event Handlers
11.	Last-Minute Checking Before Form Submission
12.	A Form for Entering a URL
13.	Storing the last value using a Hidden object.
14.	Methods and Properties of the Submit Object
15.	Methods and Properties of the Reset Object
16.	Properties of the Hidden Object
17.	Methods and Properties of the Form Object
18.	Client-Side JavaScript Objects and HTML Tags That Create Instances of Them
19.	Using the document.forms Property
20.	Use hidden field to store data

Passing a Form Object and Form Element to Functions : Form HTML « Form Control « JavaScript DHTML

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