if (document.images)  version = "n4";  
else if (navigator.userAgent.indexOf("Mozilla/2.0") != -1) version = "n3";
else version = "n2";

function on_img(imgName) {
	if (version == "n4") {
		img = eval(imgName + "_on.src");
		document [imgName].src = img;
	}
}

function off_img(imgName) {
	if (version == "n4") {
		img = eval(imgName + "_off.src");
		document [imgName].src = img;
	}
}

function message(text) {
	window.status = text;
	return true;
}

// Autotab 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();
		input.form[(getIndex(input)+1) % input.form.length].select();
	}
	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;
}
// Autotab End