var dmReady = false;

function StartOther() {
	return true;
}

function Browser() {
	var b=navigator.appName;
	if (b.indexOf('Netscape')!=-1) this.b="ns";
	else if ((b=="Opera") || (navigator.userAgent.indexOf("Opera")>0)) this.b = "opera";
	else if (b=="Microsoft Internet Explorer") this.b="ie";
	if (!b) {this.b="invalid"; this.invalid=true;}
	this.version=navigator.appVersion;
	this.v=parseInt(this.version);
	this.ns=(this.b=="ns" && this.v>=4);
	this.ns4=(this.b=="ns" && this.v==4);
	this.ns6=(this.b=="ns" && this.v==5);
	this.ie=(this.b=="ie" && this.v>=4);
	this.ie4=(this.version.indexOf('MSIE 4')>0);
	this.ie5=(this.version.indexOf('MSIE 5')>0);
	this.ie55=(this.version.indexOf('MSIE 5.5')>0);
	this.ie6=(this.version.indexOf('MSIE 6.0')>0);
	this.opera=(this.b=="opera");
	this.dom=(document.createElement && document.appendChild && document.getElementsByTagName)?true:false;
	this.def=(this.ie||this.dom);
	var ua=navigator.userAgent.toLowerCase();
	if (ua.indexOf("win")>-1) this.platform="win32";
	else if (ua.indexOf("mac")>-1) this.platform="mac";
	else this.platform="other";
}
is=new Browser();

function getLayer(name) {
	if (is.ns4)
		return findLayer(name, document);
	if (is.ie && !is.dom)
		return eval('document.all.' + name);
	if (is.dom)
		return document.getElementById(name);
	return null;
}

function findLayer(name, doc) {
	var i, layer;

	for (i = 0; i < doc.layers.length; i++) {
		layer = doc.layers[i];
		if (layer.name == name)
			return layer;
		if (layer.document.layers.length > 0)
			if ((layer = findLayer(name, layer.document)) != null)
				return layer;
	}
	return null;
}

function hideLayer(layer) {
	if (is.ns4){
		layer.visibility = "hide"
	}else{
		layer.style.visibility = "hidden"
	};
}

function showLayer(layer) {
	if (is.ns4){
		layer.visibility = "show"
	}else{
		layer.style.visibility = "visible"
	};
}

function getVisibility(layer) {

	if (is.ns4) {
		if (layer.visibility == "show")
			return "visible";
		if (layer.visibility == "hide")
			return "hidden";
		return layer.visibility;
	}else{
		return layer.style.visibility
	};
	return "";
}

function moveLayerTo(layer, x, y) {
	if (is.ns4){
		layer.moveTo(x, y);
	}else{
		layer.style.left = x;
		layer.style.top  = y
	};
}

function getImage(name) {
	if (is.ns4){
		return findImage(name, document)
	};
	if (is.ie && !is.dom){
		return eval('document.all.' + name)
	};
	if (is.dom){
		return document.getElementById(name);
	}
	return null;
}

function findImage(name, doc) {
	var i, img;

	for (i = 0; i < doc.images.length; i++)
		if (doc.images[i].name == name)
			return doc.images[i];
	for (i = 0; i < doc.layers.length; i++)
		if ((img = findImage(name, doc.layers[i].document)) != null) {
			img.container = doc.layers[i];
			return img;
		}
	return null;
}

function getImagePageLeft(img) {
	var x, obj;

	if (is.ns4) {
		if (img.container != null)
			return img.container.pageX + img.x;
		else
			return img.x;
	}else{
		x = 0;
		obj = img;
		while (obj.offsetParent != null) {
			x += obj.offsetLeft;
			obj = obj.offsetParent;
		}
		x += obj.offsetLeft;
		return x;
	};
	return -1;
}

function getImagePageTop(img) {
	var y, obj;
	if (is.ns4) {
		if (img.container != null)
			return img.container.pageY + img.y;
		else
			return img.y;
	}else{
		y = 0;
		obj = img;
		while (obj.offsetParent != null) {
			y += obj.offsetTop;
			obj = obj.offsetParent;
		}
		y += obj.offsetTop;
		return y;
	};
	return -1;
}

var currentDMenu = null;
var dmTimer = 0;
var dmTimeOut = 300;

function DMenuInit() {
	if (is.ns4) return;

	lNews = getLayer ('dmNews');
	moveLayerTo (lNews, getImagePageLeft(getImage('imgNews'))-1, 78);

	lMaterials = getLayer ('dmMaterials');
	moveLayerTo (lMaterials, getImagePageLeft(getImage('imgMaterials'))-1, 78);

   	lContacts = getLayer ('dmContacts');
	moveLayerTo (lContacts, getImagePageLeft(getImage('imgContacts'))-1, 78);

	window.tmDMenu = setInterval ('DMenuTimer()', 100);
}

function DMenu(dm) {
	if (is.ns4 || (dmReady != true)) return;
	if (currentDMenu != null){
		hideLayer (currentDMenu);
		DMenuTrace (dm);
	}else{
		DMenuTrace (dm);
	};
}

function DMenuTrace(dm) {
	if (is.ns4 || (dmReady != true)) return;
	currentDMenu = getLayer (dm);
	showLayer (currentDMenu);
	dmTimer = dmTimeOut;
}

function DMenuTimer() {
	if (is.ns4 || (dmReady != true)) return;
	if (dmTimer > 0){
		dmTimer -= 100;
	}else{
		if (currentDMenu != null) hideLayer (currentDMenu);
		currentDMenu = null;
	};
}

function dmTimerOver() {
	if (is.ns4 || (dmReady != true)) return;
	dmTimer = 10000000;
}

function dmTimerOut() {
	if (is.ns4 || (dmReady != true)) return;
	dmTimer = dmTimeOut;
}