// convert all characters to lowercase to simplify testing 
var agt=navigator.userAgent.toLowerCase(); 

//BROWSER VERSION
// Note: On IE5, these return 4, so use is_ie5up to detect IE5. 
var is_major = parseInt(navigator.appVersion); 
var is_minor = parseFloat(navigator.appVersion); 

//BROWSER TYPE 
var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1) 
            && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1) 
            && (agt.indexOf('webtv')==-1));
            
var is_nav4up = (is_nav && (is_major >= 4));
var is_nav6up = (is_nav && (is_major >= 5)); 
 
 
var is_ie   = (agt.indexOf("msie") != -1); 
var is_ie3  = (is_ie && (is_major < 4)); 
var is_ie4  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")==-1) );
var is_ie4up  = (is_ie  && (is_major >= 4));
var is_ie5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );  
var is_ie5up  = (is_ie  && !is_ie3 && !is_ie4);  
var is_dom = (document.getElementById);

//PLATFORM 
var is_win   = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );
var is_mac    = (agt.indexOf("mac")!=-1);
var is_sun   = (agt.indexOf("sunos")!=-1);
var is_irix  = (agt.indexOf("irix") !=-1);    // SGI
var is_hpux  = (agt.indexOf("hp-ux")!=-1);
var is_aix   = (agt.indexOf("aix") !=-1);      // IBM
var is_linux = (agt.indexOf("inux")!=-1);
var is_sco   = (agt.indexOf("sco")!=-1) || (agt.indexOf("unix_sv")!=-1);
var is_unixware = (agt.indexOf("unix_system_v")!=-1); 
var is_mpras    = (agt.indexOf("ncr")!=-1); 
var is_reliant  = (agt.indexOf("reliantunix")!=-1);
var is_dec   = ((agt.indexOf("dec")!=-1) || (agt.indexOf("osf1")!=-1) || 
       (agt.indexOf("dec_alpha")!=-1) || (agt.indexOf("alphaserver")!=-1) || 
       (agt.indexOf("ultrix")!=-1) || (agt.indexOf("alphastation")!=-1)); 
var is_sinix = (agt.indexOf("sinix")!=-1);
var is_freebsd = (agt.indexOf("freebsd")!=-1);
var is_bsd = (agt.indexOf("bsd")!=-1);
var is_unix  = ((agt.indexOf("x11")!=-1) || is_sun || is_irix || is_hpux || 
             is_sco ||is_unixware || is_mpras || is_reliant || 
             is_dec || is_sinix || is_aix || is_linux || is_bsd || is_freebsd);

// unterschiedliche Stylesheets fuer PC und MAC    
// Files and directory structures
var cssDir = "../css/";
var winNSCSS = "ns.css";
var winIECSS = "main.css";
var macCSS = "mac.css";
var unixCSS = "main.css";

//  Select the appropriate stylesheet
if ((is_nav4up ||is_nav6up || is_ie4up) || (!is_nav && !is_ie)) {
  ChooseStyleSheet();
}
// Function to choose the style sheet for use based on the platform and browser version
function ChooseStyleSheet() {

var fileHead = cssDir;
var styles;

//Windows
if (is_win) {
  //Netscape Win
  if (is_nav) {
    styles = fileHead + winNSCSS;
  }   
  if (is_nav4up) {
    styles = fileHead + winNSCSS;
  } 
  else
  if (is_nav6up) {
    styles = fileHead + winIECSS;    
  } 
  else 
  {
  // Windows Netscape fonts need to be larger than those for IE
  styles = fileHead + winIECSS;
  }
} 

//Mac
else if (is_mac) {
  //Internet Explorer 5
  if (is_ie5up) {
    // Default font settings for Mac IE5 match Win IE fonts
    styles = fileHead + winIECSS;
  }
  else
  if (is_nav) {
    styles = fileHead + macCSS;    
  } 
  else
  {
    //rest of Mac
    styles = fileHead + macCSS;
  }
} 
//Unix
else if (is_unix) {
  styles = fileHead + unixCSS;
}
//rest
else 
{
  // Default style = macCSS,
  // Macintosh stylesheets have the largest font sizes, which will ensure readability
  styles = fileHead + macCSS;
}
  document.write("<link rel=\"stylesheet\" type=\"text/css\" href=\"" + styles + "\">");
  return true;
}
			 


var ie;
var n;
var mac;
var nmac;
var dom;


function init() 
{
    ie=(document.all);
    n=(document.layers);
    mac=(navigator.userAgent.indexOf("Mac")!=-1);
    nmac=(n && mac);
    dom=(document.getElementById);
    if(ie)
    {
     genObj="document.all";
     genStyle=".style";
    }
    if(n) 
    {
     genObj="document.layers";
     genStyle="";
    }
}
 
init ();

var obj;
  
function createObj(divName) 
{
    if(dom)
    {
     stand_obj=document.getElementById(divName);
     obj=stand_obj.style;
    }
    else
    {
     obj=eval(genObj+"['"+divName+"']"+genStyle);
    }  
}




screeny=screen.availHeight/2-293;
screenx=screen.availWidth/2-390; 

function fenster()
{    
preWin=window.open("index0.html","ce","width=800,height=600,directories=no, screenX="+screenx+", screenY="+screeny+",top="+screeny+",left="+screenx+",resizeable=no,scrollbars=no");
} 


function actImg(imgName, layerName){
  if ((n) && (layerName.length != 0)) {
    // es handelt sich um ein Bild in einer Layer && Netscape
    document.layers[layerName].document.images[imgName].src = "../img/" + imgName + "_on.gif";
  } else if (document.images) {
    document.images[imgName].src="../img/" + imgName + "_on.gif";
  }
}

function inactImg(imgName, layerName){
  if ((n) && (layerName.length != 0)) {
    // es handelt sich um ein Bild in einer Layer && Netscape
    document.layers[layerName].document.images[imgName].src = "../img/" + imgName + "_off.gif";
  } else if (document.images) {
    document.images[imgName].src="../img/" + imgName + "_off.gif";
  }
} 
	  
	  
	//act/inact two images!  
	  function actImgf(imgName,imgNamef){
 if (document.images){
  document.images[imgName].src="../img/" + imgName + "_on.gif";
  document.images[imgNamef].src="../img/" + imgNamef + "_on.gif";
      }
      }
function inactImgf(imgName,imgNamef){
 if(document.images){
  document.images[imgName].src="../img/" + imgName + "_off.gif";
  document.images[imgNamef].src="../img/" + imgNamef + "_off.gif";
      }
      } 
	  
	  

function show(divName) 
{
    createObj(divName);
    obj.visibility="visible";
}


function hide(divName) 
{
    createObj(divName);
    obj.visibility="hidden";
}



if (n) {
   origWidth = innerWidth;
   origHeight = innerHeight;
}

function reDo() {
   if (innerWidth != origWidth || innerHeight != origHeight) 
      history.go(0);
}

if (n) onresize = reDo;


// Funktion zum Bilder vorladen

var preloadArray = new Array();
var preloadArrayLength = 0;
function preloadImages() {
	if (document.images) {
		var imgName = preloadImages.arguments;
		for (var i=0; i<imgName.length; i++) {
	    	preloadArray[preloadArrayLength] = new Image;
		    preloadArray[preloadArrayLength].src = pfad + imgName[i] + "_on.gif";
			preloadArrayLength++;
		}
	}
}


    pfad='../img/';
    preloadImages(
"stiftung",
"heusshaus",
"theodor",
"aktuelles",
"kontakt",
"home",
"stelltsichvor",
"ziele",
"bibliothek",
"archiv",
"veranstaltungen",
"publikationen",
"objekte",
"errichtungsgesetz",
"gaestebuch",
"impressum",
"links", "gremien", "wohnraeume", "forschungsbibliographie", "wohnraeume", "erinnerungsraum", "dauerausstellung", "wechselausstellung", "stationen", "geburt", "kaiserreich", "weimar", "drittes", "nachkriegszeit", "bundesrepublik", "kontaktstiftung", "kontaktheusshaus", "newsletter" );