// --------------------------------------------------
// simple dhtml menue
// 
// needs lib.js
// made for static css/html, to make shure
// that navigation without js is possible
//
//
// the calls "initNC4x" and "initAnim" must be
// deleted in case of external use
//
// NOTE: if menue opens over other div-layer add
// z-index to the menue-css-properties, otherwise 
// IE5/Mac will not register mousemove over the 
// divs properly!
//
// author kgde@wendenburg.de
// modified:
//
// --------------------------------------------------


// every menuepoint
var menueDivs =  new Array("home", "kamera", "grafik", "webdesign", "kontakt");

// submenues belonging to every menuepoint or 0
var subDivs   =  new Array(0, "kameraSub", "grafikSub", "webdesignSub", "kontaktSub");

var aktDiv =  0;
var bgc    =  nc? "bgColor" : "backgroundColor";      // crossover css-attribut for background-color
var doOpen =  new Array();                            // remember what divs to open or to close while moving over a div
var doSwap =  new Array();                            // remember where to change color
var ncIsIn =  0;                                      // a little flag to keep nc 4x from hiding divs too quick
var isIn   =  0;                                      // a flag needed for mozContains
var bye    =  1;                                      // do not swap divs after click

// start menue, register events within the divs
function initMenue() {
	// just a little css-help for nc4x, not necessary for the menue
	initNC4x();
	for (i in menueDivs) {				
		dRefS(menueDivs[i])[bgc] =  "#cccccc";				
		if (nc) dRef(menueDivs[i]).captureEvents(Event.MOUSEMOVE);		
		dRef(menueDivs[i]).onmousemove   =  divMove;	
		// submenue available?
		if(subDivs[i]) {
			if (nc) dRef(subDivs[i]).captureEvents(Event.MOUSEMOVE);	
			dRef(subDivs[i]).onmousemove =  divMove; 					
		}	
		doOpen[menueDivs[i]]             =  subDivs[i];
		doOpen[subDivs[i]]               =  subDivs[i];
		doSwap[menueDivs[i]]             =  menueDivs[i];
		doSwap[subDivs[i]]               =  menueDivs[i];
	}
	if (nc) document.captureEvents(Event.MOUSEMOVE); 
	document.onmousemove =  docMove;
	window.onunload=function() {bye =  1};
	bye =  0;
}

// mousemove over div
function divMove(e) {
	if (typeof bye != "undefined" && !bye) {
		if (!aktDiv) on(this.id);
		else if (aktDiv != this) {
			off (aktDiv.id);
			on (this.id);
		} 
		aktDiv =  this;	
		ncIsIn =  1;
	}
}

// mousemove in document
function docMove(e) {	
	// nc 4x
	if (nc) {
		if (!ncIsIn && aktDiv) {
			off(aktDiv.id);
			aktDiv =  0;
		}
		else ncIsIn =  0;
	}
	// nc6, moz, opera & ie
	if (dom || ie4) {
		var checkEl =  (nc6 || window.opera)? e.target : window.event.srcElement;
		if(aktDiv) {
			var isElIn =  (aktDiv == checkEl)? 1 : (nc6? mozContains(aktDiv, checkEl) : aktDiv.contains(checkEl));				
			if (!isElIn) {
				off (aktDiv.id);
				aktDiv =  0;
			}	
			isIn =  0; // resetting moz-flag
		}		
	}
	// bar anim, not necessary for the menue
	initAnim ();
	if (nc) routeEvent(e);
}

// checking for Mozilla if n2 within n1
function mozContains(n1, n2) {
	if(n1 && n2 && n1.hasChildNodes()) {
		for (var i = 0; i <  n1.childNodes.length; i++) {
			var nx1 =  n1.childNodes[i];
			if (nx1 == n2) isIn = 1;
			if (nx1.hasChildNodes()) mozContains(nx1, n2);
		}	
	}
	return isIn;
} 

// open and close submenue, change color
function on (el)  {
	if (doOpen[el]) dRefS(doOpen[el]).visibility =  "visible";
	dRefS(doSwap[el])[bgc]                       =  "#FC8F01"; 
}

function off (el) {
	if (doOpen[el]) dRefS(doOpen[el]).visibility =  "hidden";
	dRefS(doSwap[el])[bgc]                       =  "#cccccc";
}