/********************************
 * Aufruf beim Start jeder Seite
 ********************************/
function init() {
  RemoveMacIEshadow();
  invokeInitFunctions();
  DHTML_init();
  restoreScrollY();
}


/********************************
 * Einfache Objekte
 ********************************/
function xy(x, y) {
  this.x = x;
  this.y = y;
}

/************************************
 * Browserunabhängiges DHTML API
 * Konzepte gemäss http://www.quirksmode.org/
 ************************************/

/*
 * Usage: 
 * var x = new getObj('layername');
 * x.style.top = 20
 * alert(x.obj.id)
 */
function getObj(name) {
  if (document.getElementById) {
    this.obj = document.getElementById(name);
    this.style = document.getElementById(name).style;
  } else if (document.all) {
    this.obj = document.all[name];
    this.style = document.all[name].style;
  } else if (document.layers) {
    this.obj = document.layers[name];
    this.style = document.layers[name];
  }
}

function getPos(obj) {
  var curleft = 0;
  var curtop = 0;
  if (obj.offsetParent) {
    while (obj.offsetParent) {
      curleft += obj.offsetLeft
      curtop += obj.offsetTop
      obj = obj.offsetParent;
    }
  }  else if (obj.x) {
    curleft += obj.x;
    curtop += obj.y;
  }
  var pos = new xy(curleft, curtop);
  return pos;
}


/* The inner dimensions of the window or frame. */
function getWindowSize() {
  var size = new xy(); 
  if (self.innerHeight) { // all except Explorer
    size.x = self.innerWidth;
    size.y = self.innerHeight;
  } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
    size.x = document.documentElement.clientWidth;
    size.y = document.documentElement.clientHeight;
  } else if (document.body) { // other Explorers
    size.x = document.body.clientWidth;
    size.y = document.body.clientHeight;
  } // no else ? 
  return size;
}

/* How much the page has scrolled. */
function getScrollPos() {
  var size = new xy(); 
  if (self.pageYOffset) { // all except Explorer
    size.x = self.pageXOffset;
    size.y = self.pageYOffset;
  } else if (document.documentElement && document.documentElement.scrollTop) { // Explorer 6 Strict
    size.x = document.documentElement.scrollLeft;
    size.y = document.documentElement.scrollTop;
  } else if (document.body) { // all other Explorers
    size.x = document.body.scrollLeft;
    size.y = document.body.scrollTop;
  } // no else ? 
  return size;
}
function setScrollPosY(y) {
  if (self.pageYOffset) { // all except Explorer
    self.pageYOffset = y;
  } else if (document.documentElement && document.documentElement.scrollTop) { // Explorer 6 Strict
    document.documentElement.scrollTop = y;
  } else if (document.body) { // all other Explorers
    document.body.scrollTop = y;
  } // no else ? 
}


/* The height of the total page (usually the body element). */
function getPageSize() {
  var size = new xy(); 
  var test1 = document.body.scrollHeight;
  var test2 = document.body.offsetHeight
  if (test1 > test2) { // all but Explorer Mac
	  size.x = document.body.scrollWidth;
	  size.y = document.body.scrollHeight;
  } else { // Explorer Mac, would also work in Explorer 6 Strict, Mozilla and Safari
	  size.x = document.body.offsetWidth;
	  size.y = document.body.offsetHeight;
  }
  return size;
}

/**********************************************************
 * Smart navigation (keeping scroll position)
 * <a href="javascript: smartNavigate(encodedUrl)">link</a>
 *********************************************************/
 function restoreScrollY() {
  var filter  = /[\?&]JsScrollY=([0-9]+)/;
  filter.exec(location.href);
  var scrollY = Number(RegExp.$1);
  if(scrollY) setScrollPosY(scrollY);
} 

function smartNavigate(url) {
  var sep;
  if(url.indexOf('?') > -1) { sep = '&'; } else {sep = '?'; }
  url = url + sep + 'JsScrollY=' + getScrollPos().y
  location.href = url;
  return;
}


/****************************************
 * Browserunabhängiges DHTML API (Legacy)
 ****************************************/
var DHTML = 0;
var DOM = 0;
var MS4 = 0;
var NS4 = 0;
var OP = 0;
var winRef = "";
var layerRef = "";
var layerLeftBracket = "";
var layerRightBracket = "";
var styleRef = ""; 
var scrollX  = "", scrollY  = ""; // Ausdruck zum Ermitteln der Position der linken obere innere Fensterecke zum Dokumentursprung

function DHTML_init() {
  if (window.opera) {
    OP = 1;
  }
  if(document.getElementById) {
    DHTML = 1;
    DOM = 1;
  }
  if(document.all && !OP) {
    DHTML = 1;
    MS4 = 1;
  }
  if (window.netscape && window.screen &&!DOM && !OP){
    DHTML = 1;
    NS4 = 1;
  }
  // Entscheiden, ob DOM, alte Netscape oder alte MS IE Syntax. 
  if (DOM) {
    winRef   = "window."
    layerRef = ".getElementById"
    styleRef = ".style"
    layerLeftBracket  = "(";
    layerRightBracket = ")";
  } else if (NS4) {
    winRef   = ""
    layerRef = ".layers"
    styleRef = ""
    layerLeftBracket  = "[";
    layerRightBracket = "]";
  } else { 
    // MS4, but also others. 
    winRef   = ""
    layerRef = ".all"
    styleRef = ".style"
    layerLeftBracket  = "[";
    layerRightBracket = "]";
  }
  if (navigator.appName == "Netscape") {
    scrollX  = "window.pageXOffset"
    scrollY  = "window.pageYOffset"
  } else {
    scrollX  = "document.body.scrollLeft"
    scrollY  = "document.body.scrollTop"
  }
}


/**
 * Dokument-relative Position eines Mausklicks.
 */
function eventPos(e) {
  this.pageX = 0;
  this.pageY = 0;
  if (navigator.appName == "Netscape") {
    this.pageX = e.pageX;
    this.pageY = e.pageY;
  } else {
    this.pageX = document.body.scrollLeft + e.clientX;
    this.pageY = document.body.scrollTop + e.clientY;
  }
}


/**
 * Setzt CSS Wert anhand Objektnamen.
 */
function setStyle(layer, stylename, stylevalue) {
  return eval('layer' + styleRef + "." + stylename + " = '" + stylevalue + "';"); 
}

/**
 * Objekt mit angegebenem Namen verstecken.
 */
function hide(layername) {
  (new getObj(layername)).style.visibility = 'hidden';
}  
        
/**
 * Objekt mit angegebenem Namen zeigen.
 */
function show(layername) {
  (new getObj(layername)).style.visibility = 'visible';
}

/**
 * Objekt mit angegebenem Namen zeigen.
 * (display / nodisplay / switchdisplay)
 */
function nodisplay(layername) {
	(new getObj(layername)).style.display = 'none';
}				
function display(layername) {
	(new getObj(layername)).style.display = '';
}
function switchdisplay(layername) {
	this_display = (new getObj(layername)).style.display;
	if (this_display == 'none') {
		display(layername);
	}
	else {
		nodisplay(layername);
	}
}	



/**
 * Objekt mit angegebenem Namen an Bildschirmoberkante verschieben und zeigen.
 */
function showscrolled(layername) {
  var yscrolled = eval(scrollY);
  yscrolled=parseInt(yscrolled)+200;  
  (new getObj(layername)).style.top = yscrolled;
  show(layername);
}

/**
 * Objekt mit angegebenem Namen an Eventposition (Mausklick) zeigen.
 * X-Position ist allerdings fix. Versatz in Negativrichtung, d.h. Minus = unten.
 */
function showhere(layername, offsetY, e)  {  
  var y = 0; 
  var pos = new eventPos(e);
  y = pos.pageY - offsetY; 
  if(y < 0) { y = 0; }
  if(navigator.userAgent.indexOf("Safari") > -1 && y == 0) {
    y = eval(scrollY); // Safari bug, some events have all coordinates to 0 (e.g. button onclick)
  }
  (new getObj(layername)).style.top = y;
  show(layername);    
}

/**
 * Objekt mit angegebenem Namen an Eventposition (Mausklick) zeigen.
 */
function showUnderMousePointer(layername, offsetX, offsetY, e) {
  var x, y;      
  var pos = new eventPos(e);
  x = pos.pageX + offsetY; 
  y = pos.pageY + offsetY; 
  if(x < 0) { x = 0; }
  if(y < 0) { y = 0; }
  if(navigator.userAgent.indexOf("Safari") > -1 && y == 0) {
    y = eval(scrollY); // Safari bug, some events have all coordinates to 0 (e.g. button onclick)
  }
  (new getObj(layername)).style.left = x;
  (new getObj(layername)).style.top = y;
  show(layername);    
}


//register a function to load onLoad :)
var initFunctions = new Array();
function registerInitFunction(f) {
	initFunctions[initFunctions.length] = f;
}
function invokeInitFunctions() {
	var f;
	for(var i = 0; i < initFunctions.length; i++) {
		f = initFunctions[i];
		f();
	}
}



/************************************************************
 * Verhindert die Schatten-Markierung jedes Links auf MacIE5  
 ************************************************************/
function RemoveMacIEshadow() {
  if (document.images&&navigator.userAgent.indexOf("MSIE")!=-1) {
    for(i=0;i<document.links.length;i++) {
      target=eval("document.links[i]");
      target.onfocus=BlurHandler;
    }
  }
}
    
function BlurHandler() {
  obj=window.event.srcElement;
  if(obj.tagName == "a" || obj.tagName=="A") obj.blur();
}


/************************************************************
 * CMS Funktionalität  
 ************************************************************/
//Navigation: remembers the latest clicked Link/Frame
function nav_remember(i) 
{
  nav_clicked=i;
  nav_hide();
}
      
//Navigation: hides inactive Layers
function nav_hide(i)
{
  for (j=0;j<=nav_anzahl-1;j++) {
    var navh="nav"+j;
    if (j!=i) {
      if (j!=nav_clicked) {
        (new getObj(navh)).style.visibility = 'hidden';
      }
    }
  }
}  
//Navigation: shows the active Layers  
function nav_show(i)
{
  var nav = "nav" + i;
  (new getObj(nav)).style.visibility = 'visible';
  nav_hide(i);
}

/************************************************************
 * Home Navigation Highlight functions
 ************************************************************/
//Highlight the navigation (homenav)
function changeClass(id, className) {
	var obj = document.getElementById(id);
	obj.className = className;
}

/************************************************************
 * JavaScript eMail-Adressen-Verschlüsseler
 * URL: (http://www.derwok.de/service/email_stopspam/)
 ************************************************************/
function UnCryptMailto(s) {
	s = unescape(s); // Url Decode
	var shift = 2; //Has to be the same as in the method CryptMailto (->find in tools).
	var n=0;
	var r="";
	for(var i=0;i<s.length;i++) { 
		n=s.charCodeAt(i); 
		if (n>=8364) {n = 128;}
		r += String.fromCharCode(n-(shift)); 
	}
	return r;
}

function linkTo_UnCryptMailto(s) {
	location.href=UnCryptMailto(s);
}