Dynamic Drop Down List 2

Jay Rumsey Sep 8, 2008

General

This script creates dynamic drop down boxes, preventing duplicate selections. When a selection is made in the first box, that option is removed in the second box, with the same procedure for the third box.

Notes

Created by: Jay M. Rumsey, OD
Web Site: http://www.nova.edu/~rumsey
Posted: September 8, 2008

Source Code

Paste this source code into the designated areas.

External file

Paste this code into an external JavaScript file named: dynamicDropDown2

/* This script and many more are available free online at
The JavaScript Source!! http://www.javascriptsource.com
Created by: Jay M. Rumsey, OD | http://www.nova.edu/~rumsey */

function NewList(selObj,newObj) {
  var selElem = document.getElementById(selObj);
  var selIndex = selElem.selectedIndex;
  var newElem = document.getElementById(newObj);
  var tmp = '';
  newElem.options.length = 0;
  for (var i=0; i<selElem.options.length; i++) {
    tmp = selElem.options[i].value;
    if (i != selIndex) { newElem.options[newElem.options.length] = new Option(tmp,tmp); }
  }
}

Head

Paste this code into the HEAD section of your HTML document.


<script type="text/javascript" src="dynamicDropDown2"></script>

Body

Paste this code into the BODY section of your HTML document


<table>
  <tr>
    <td>
      <select id="SBox0" onclick="NewList('SBox0','SBox1')">
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
      <option value="4">4</option>
      <option value="5">5</option>
      </select>
    </td>
    <td>
      <select id="SBox1" onclick="NewList('SBox1','SBox2')">
      <option value=""></option>
      </select>
    </td>
    <td>
      <select id="SBox2">
      <option value=""></option>
      </select>
    </td>
  </tr>
</table>

Leave a Response

(1 comment)

i find your script very useful.[br /][br /]thanking you,[br /] Datta

datta Sep 10, 2008

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