<!-- Original:  Cyanide_7 (leo7278@hotmail.com) -->
<!-- Web Site:  http://members.xoom.com/cyanide_7 -->

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

<!-- USAGE: onKeyUp="return autoTab(this, 3, event);" -->

<!-- Begin
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;
	}
//  End -->