var menu_punkt = null;
var menu = null;
var hideExecute = null;
var submenu_hide_timeout = 0.5;

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();

function menu_start(){
	buildAll();
	$('menu').descendants().each(function(top) {
	 if((top.hasClassName("popup_menu")) & ("A" == top.tagName)){
	    if(Element.visible(top)) {
	    	top.onmouseover = link_in;
	    }
	 }
	});
}

var peter = 0;

function pngfix(obj)
{
	if (BrowserDetect.browser == 'Explorer' &&  BrowserDetect.version <= 6 && !obj.tagged )
	{
		var src = obj.src;
		obj.tagged = true;
		if (obj.width) {
			obj.style.width = obj.width + 'px';
			obj.style.height = obj.height + 'px';
		} else {
			img = Element.extend(obj);
			if (img.previous()) {
				obj.style.width = img.previous().width + 'px';
				obj.style.height = img.previous().height + 'px';
			} else {
				return;
			}
		}
		obj.src = "bilder/leer.gif";
		obj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+src+"', sizingMethod='scale');";
	}
}

function pswitch(obj) {
	punkt = Element.extend(obj);
	if (punkt) {
		if (punkt.hasClassName("aktiv")) return;
		punkt.descendants().each(function(top) {
			if((top.hasClassName("hover")) & ("IMG" == top.tagName)){
				top.removeClassName("hover");
				if (BrowserDetect.browser == 'Explorer' &&  BrowserDetect.version <= 6 && !top.tagged ) {
					pngfix(top);
				}
				top.onmouseout = pswitch;
			} else {
				top.addClassName("hover");
			}
		});
	}
}

function link_in(){
	hideAll();
	menu_punkt = Element.extend(this);
	aparent = menu_punkt.up();
	aparent.descendants().each(function(top) {
	 if((top.hasClassName("popup_hover_js")) & ("UL" == top.tagName)){
		menu = top;
		menu.show();
    	menu.onmouseover = menu_in;
		menu.onmouseout = null;
		menu_punkt.onmouseout = link_out;
	 }
	});	
	return false;
}

function link_out() {
	menu_punkt.onmouseout = null;
	if (menu.onmouseout == null) submenu_tryhide();
}

function menu_out() {
	menu.onmouseout = null;
	if (menu_punkt.onmouseout == null) submenu_tryhide();
}

function menu_in() {
	menu.onmouseout = menu_out;
}

function submenu_tryhide() {
	if (hideExecute) hideExecute.stop();
	hideExecute = new PeriodicalExecuter(submenu_hide, submenu_hide_timeout);
}

function submenu_hide() {
	if (hideExecute) hideExecute.stop();
	if (!menu.onmouseout && !menu_punkt.onmouseout) {
		menu.onmouseover = null;
		hideAll();
	}
}

function hideAll() {
	$('menu').descendants().each(function(top) {
	 if((top.hasClassName("popup_hover_js")) & ("UL" == top.tagName)){
	    if(Element.visible(top)) {
	    	top.hide();
	    }
	 }
	});
}

function buildAll() {
	$('menu').descendants().each(function(top) {
	 if((top.hasClassName("popup_hover")) & ("UL" == top.tagName)){
    	top.hide();
		top.addClassName("popup_hover_js");
		top.removeClassName("popup_hover");
	 }
	});
}

script_loaded = true;