//------------------------------------
// Created on 5.1.2005
// (c) Jan Ptacek
//------------------------------------

// register onload init
addListener(window, 'load', addBehavior);

//------------------------------------
//
//------------------------------------

function addBehavior() {
	// get menu roots
	var node;
	var i = 0;
	var k = 1;

	var menu = document.getElementById("hmenu");
	if (menu != null)
	{
		var alluls = menu.getElementsByTagName("UL");

		for (var i=0;i<alluls.length;i++)
		{
			var node = alluls[i];
			if (node.id=="speciallevelid")
			{	
			  if (node.getAttribute('folder'))
			  {
				//This is the active folder on load so store HTML
				ActiveSubMenuHTML = node.innerHTML;
			  }
			}
		}
		
		var menunodes = menu.childNodes;
		for (var j = 0; j < menunodes.length;j++) 
		{
		  if (menunodes[j].tagName == 'LI') initMenuItem(menunodes[j], k++);
		}

		if (sep_submenusparam!='')
		{
			menudiv = document.getElementById("menu");
			addListener(menudiv, 'mouseout',  hideSubmenu);
			document.getElementById("submenu").innerHTML = ActiveSubMenuHTML;
		}
	}
}

function initMenuItem(li, num) {
	// to emulate :first-child
	if (num == 1) {
		//li.style.borderTopWidth = '1px';
		//li.style.borderLeftWidth = '1px';
	}

	for (var i = 0; i < li.childNodes.length;i++) {
		if (li.childNodes[i].tagName == 'UL') {
			var nodeUL = li.childNodes[i];
			li.cachedUL = nodeUL;
			// 1 + n-level submenu
			if (li.parentNode.className != 'hmenu') {
				// background arrow
				li.style.backgroundRepeat = 'no-repeat';
				li.style.backgroundImage = 'url("/external/gfx/light_arrow.gif")';
				li.style.backgroundPosition = 'center right';
				//nodeUL.style.paddingLeft = (menu.firstChild.firstChild.clientWidth) + 'px';
			}
			addListener(li, 'mouseover', showSubmenu);
			if (sep_submenusparam=='')
			{
			  addListener(li, 'mouseout',  hideSubmenu);
			}

			var k = 1;
			for (var j = 0; j < nodeUL.childNodes.length;j++) {
				if (nodeUL.childNodes[j].tagName == 'LI')
					initMenuItem(nodeUL.childNodes[j], k++);
			}
		}
	}
}

function showSubmenu(e) {
	if (!e) var e = window.event;
	var target = getTarget(e);
	if (target.tagName == 'A')
		target = target.parentNode;
	if (target.cachedUL) 
	{
		if (sep_submenusparam=='')
			{target.cachedUL.style.display = 'block';}
		else
		{
			var alllis = target.cachedUL.childNodes;
			var submenuobj = document.getElementById("submenu");
			submenuobj.innerHTML = target.cachedUL.innerHTML;
		}
	}
}

function hideSubmenu(e) {
	if (!e) var e = window.event;
	var target = getTarget(e);
	var related = getRelatedTarget(e);
	if (!related || related.tagName == 'HTML')
		related = document.getElementsByTagName('body')[0];

	// maybe mouse left only into successor, handle
	if (target.tagName == 'A')
		target = target.parentNode;
	if (isAncestor(target, related)||((sep_submenusparam!='')&&isAncestor(menudiv,related)))
		return;
	// it left into ancestor
	// find ul upon related node or body
	var commonUL = related;
	while (commonUL.tagName != 'UL' && commonUL.tagName != 'BODY')
		commonUL = commonUL.parentNode;
	// iterate up the tree from target till commonUL and close submenu
	while (target != commonUL && target.tagName != 'BODY') {
		if (target.cachedUL&&sep_submenusparam=='')
			target.cachedUL.style.display = 'none';
		target = target.parentNode;
	}
	if (sep_submenusparam!='') document.getElementById("submenu").innerHTML = ActiveSubMenuHTML;
}

function isAncestor(ancestor, child) {
	while (child != ancestor && child.nodeName != 'BODY')
		child = child.parentNode;
	return child == ancestor ? 1 : 0;
}

//------------------------------------
//	retrieve target for event
//------------------------------------

function getTarget(e) {
	var target;
	if (e.target) target = e.target;
	else if (e.srcElement) target = e.srcElement;
	if (target.nodeType == 3) // defeat Safari bug
		target = target.parentNode;

	return target;
}

//------------------------------------
//	retrieve related target for event
//------------------------------------

function getRelatedTarget(e) {
	return (e.relatedTarget) ? e.relatedTarget : e.toElement;
}

function addListener(obj, event, handler) {
	if (obj.addEventListener) {
		obj.addEventListener(event, handler, false);
	} else if (obj.attachEvent) {
		obj.attachEvent('on' + event, handler);
	} else {
		window.status = 'Your browser software does not meet w3c.org standards.  Please upgrade your browser to a more recent version or a standards compliant browser such as Microsoft Internet Explorer 6.0 or Firefox.';
	}
}

function addStyleSheet(title, href) {
	var head = document.getElementsByTagName('head')[0];
	var link = document.createElement('link')
	link.rel = 'stylesheet';
	link.type = 'text/css';
	link.title = '';
	link.href = href;

	head.appendChild(link);
}


var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();

//if (BrowserDetect.browser == "Firefox" && BrowserDetect.version < 1.6) alert("Please upgrade to a more recent version of the Firefox browser");
//if (BrowserDetect.browser == "Explorer" && BrowserDetect.version < 7) alert("Please upgrade to a more recent version of the Internet Explorer browser");
//alert("Browser: "+BrowserDetect.browser+"\nVersion: "+BrowserDetect.version+"\nOS: "+BrowserDetect.OS);