N   = (document.layers) ? true:false;                 // netscape 4
I   = (document.all) ? true:false;                    // ie4+
DOM = ((document.getElementById)&&(!I))?true:false;   // ns6 etc.

var brow;
	if(document.all) brow = 'i';
	else brow = 'n';
var pixL;

function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function Fensterweite()
{
 if (window.innerWidth) return window.innerWidth;
 else if (document.body && document.body.offsetWidth) return document.body.offsetWidth;
 else return 0;
}

function Fensterhoehe()
{
 if (window.innerHeight) return window.innerHeight;
 else if (document.body && document.body.offsetHeight) return document.body.offsetHeight;
 else return 0;
}

function getULC() {
	pixL = Fensterweite()/2 - 185;
}

function show(showWelch) {
	if (N) {
		document.layers[showWelch].visibility = "show";
	}
	if (DOM) {
		welchLay = document.getElementById(showWelch);
		welchLay.style.left = pixL;
		welchLay.style.visibility = "visible";
	}
	else {
		document.all['' + showWelch].style.left = pixL;
		document.all['' + showWelch].style.visibility = "visible";
	}
}

/*		einen Layer verbergen					*/
function hide(hideWelch) {
	if (N) {
		document.layers[hideWelch].visibility = "hide";
	}
	if (DOM) {
		welchLay = document.getElementById(hideWelch);
		welchLay.style.visibility = "hidden";
	}
	else {
		document.all['' + hideWelch].style.visibility = "hidden";
	}
}

function hideall() {
	var allLay = new Array('plan_e0', 'plan_e1', 'plan_w0', 'plan_w1');
	for(var i =0; i<4; i++) {
		hide(allLay[i]);
	}
}