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/* 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;
}


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


/*
<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>
*/