function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		menu_01_over = newImage("images/menu/menu_01-over.gif");
		menu_02_over = newImage("images/menu/menu_02-over.gif");
		menu_03_over = newImage("images/menu/menu_03-over.gif");
		menu_04_over = newImage("images/menu/menu_04-over.gif");
		menu_05_over = newImage("images/menu/menu_05-over.gif");
		menu_06_over = newImage("images/menu/menu_06-over.gif");
		preloadFlag = true;
	}
}

/*  dropmenu  */
var dom = (document.getElementById)? true : false;
var ie4 = (!dom && document.all)? true : false;
var ua = navigator.userAgent.toLowerCase();
var isMS = (ua.indexOf("msie") != -1 && ua.indexOf("opera") == -1)? true : false;

function getById(id) {
	if (dom) return document.getElementById(id);
	else return document.all[id];
}
function switchOn(id) {
	var el = getById(id);
	if (el) el.style.display = "block";
	if (el) {
		if (dom) {
			if (!isMS && el.tagName.toUpperCase() == "TR") el.style.display = "table-row";
			else el.style.display = "block";
		} else {
			el.style.display = "block";
		}
	}
}
function switchOff(id) {
	var el = getById(id);
	if (el) el.style.display = "none";
}

function openIt(x) {
	closeIt();
	switchOn("box" + x);
}

function closeIt() {
	for (i=0; i<10; i++) {
		switchOff("box" + i);
	}
}

function openIt2(x, y, z){
	switchOn("box" + x);
	switchOff("box" + y);
	switchOff("box" + z);
}
var htcounter=(0-1);

function htcheck(){
	if (htcounter==(0-1)){
		return 0;
	}
	if (htcounter==0){
		closeIt();
		htcounter=-1;
	}
	else{
		htcounter = htcounter-1;
		window.setTimeout("htcheck();", 100);
	}
}

function htstart(){
	//alert('htstart');
	htcounter = 20;
	window.setTimeout("htcheck();", 100);
}

function htstop(){
//alert('htstop');
	htcounter = 0-1;
}