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

/**********************************************************
 * Several DHTML macros
 *********************************************************/

/* 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;
  }
}

/* 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 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);    
}


/**********************************************************
 * 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;
}




/************************************************************
 * 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();
}