var isNN = (navigator.appName.indexOf("Netscape")!=-1);
//Autotab to next field (nextfield is an optional parameter)
function autoTab(input,len, e, NextField) {
	var keyCode = (isNN) ? e.which : e.keyCode; 
	var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
	var intIndex,i ; 
	if(input.value.length >= len && !containsElement(filter,keyCode)) {
		input.value = input.value.slice(0, len);
		if((NextField!=null) && (NextField!='') ){
			var objNextField = document.getElementById(NextField);
			objNextField.focus();
			return true;
		}
		else
		{
			if (input.form[(getIndex(input)+1) % input.form.length].disabled == false ){
					input.form[(getIndex(input)+1) % input.form.length].focus();
			}
			else
			{
				intIndex = (getIndex(input)+1) % input.form.length
					for (i=intIndex + 1 ;i< input.form.length ; i++){
					if (input.form[i].disabled == false ){
					input.form[i].focus();
					return true;
					}
					}
			return false;
			}
		}
	}
	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;
}