Storing the last value using a Hidden object. : Form HTML : Form Control : JavaScript DHTML examples (example source code) Organized by topic

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Storing the last value using a Hidden object.

Please note that some example is only working under IE or Firefox.


/*
JavaScript Unleashed, Third Edition
by Richard Wagner and R. Allen Wyke 

ISBN: 067231763X
Publisher Sams CopyRight 2000

*/

<html>
<head>
<title>Hidden Test</title>
<script language="JavaScript">
   
     function postData(value) {
          document.form1.holder2.value = document.form1.holder.value
          document.form1.holder.value = value
     }
   
     function resetValue() {
          var len = document.form1.ctyList.length
          for (var i=0; i<len; i++) {
               if (document.form1.ctyList[i].value ==
                  document.form1.holder2.value) {
                    document.form1.ctyList[i].checked = "1"
                    break }
          }
     }
   
</script>
</head>
   
<body>
<h1>I remember</h1>
      <form name="form1" method="POST">
      <p>
      <input type=radio name="ctyList" value="Argentina" onClick="postData(this.value)">Argentina
      </p>
      <p>
      <input type=radio name="ctyList" value="Burkina Faso" onClick="postData(this.value)">Burkina Faso
      </p>
      <p>
      <input type=radio name="ctyList" value="Pakistan" onClick="postData(this.value)">Pakistan
      </p>
      <p>
      <input type=radio name="ctyList" value="Switzerland" onClick="postData(this.value)">Switzerland</p>
      <p><input type=radio name="ctyList" value="United Kingdom" onClick="postData(this.value)">United Kingdom</p>
      <p><input type=radio name="ctyList" value="United States of America" onClick="postData(this.value)">United States of America</p>
      <p><input type=radio name="ctyList" value="Zambia" onClick="postData(this.value)">Zambia</p>
      <p><input type=radio name="ctyList" value="Zimbabwe" onClick="postData(this.value)">Zimbabwe</p>
      <p><input type=button name="UndoLast" value="Undo Last" onClick="resetValue()"></p>
        
      <INPUT TYPE="hidden" NAME="holder" value="">
      <INPUT TYPE="hidden" NAME="holder2" value="">
      </form>
</body>
</html>
           
       
Related examples in the same category
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.   Passing a Form Object and Form Element to Functions
12.   Last-Minute Checking Before Form Submission
13.  A Form for Entering a URL
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
























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