The JavaScript Source: Forms : Auto Tab

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General

Automatically sets focus to the next form element when the current form element's maxlength has been reached. The user, then, does not have to manually click in or tab to the next field. Very easy to change for different size fields. Perfectly suited for constant-length strings such as a phone number or social security numbers.

Notes

Created by: Cyanide_7
Posted: April 21, 2000

Source Code

Paste this source code into the designated areas.

External file

Paste this code into an external JavaScript file named: autoTab.js

0
/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: Cyanide_7 |  */
var isNN = (navigator.appName.indexOf("Netscape")!=-1);

function autoTab(input,len, e) {
  var keyCode = (isNN) ? e.which : e.keyCode; 
  var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
  if(input.value.length >= len && !containsElement(filter,keyCode)) {
    input.value = input.value.slice(0, len);
    input.form[(getIndex(input)+1) % input.form.length].focus();
  }

  function containsElement(arr, ele) {
    var found = false, index = 0;
    while(!found && index < arr.length)
    if(arr[index] == ele)
    found = true;
    else
    index++;
    return found;
  }

  function getIndex(input) {
    var index = -1, i = 0, found = false;
    while (i < input.form.length && index == -1)
    if (input.form[i] == input)index = i;
    else i++;
    return index;
  }
  return true;
}

Head

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


<script type="text/javascript" src="autoTab.js"></script>

Body

Paste this code into the BODY section of your HTML document


<form>
Phone Number : <br>
1 - (
<input onKeyUp="return autoTab(this, 3, event);" size="4" maxlength="3">) - 
<input onKeyUp="return autoTab(this, 3, event);" size="4" maxlength="3"> - 
<input onKeyUp="return autoTab(this, 4, event);" size="5" maxlength="4">
<br><br>
Social Security Number : <br>
<input onKeyUp="return autoTab(this, 3, event);" size="4" maxlength="3"> - 
<input onKeyUp="return autoTab(this, 2, event);" size="3" maxlength="2"> - 
<input onKeyUp="return autoTab(this, 4, event);" size="5" maxlength="4">
</form>

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User Comments

3. From: Munish
01/23/2008 00:27:44

2. From: Nasir Ali
This function has one anomaly
05/24/2007 09:09:17

1. From: Walter Coole
05/08/2007 19:54:13

Navigation Menu

Internet.commerce

Internet.com

Developer Channel

Great Sites

Promotions

General

Notes

Source Code

External file

Head

Body

User Comments

3. From: Munish01/23/2008 00:27:44

2. From: Nasir AliThis function has one anomaly05/24/2007 09:09:17

1. From: Walter Coole05/08/2007 19:54:13

3. From: Munish
01/23/2008 00:27:44

2. From: Nasir Ali
This function has one anomaly
05/24/2007 09:09:17

1. From: Walter Coole
05/08/2007 19:54:13