var topOffset = 500;	
var topLimit = 0;
var bottomLimit = 500;
var scrolling = false;
var _global_duration = 0.7;

clearField = function(element,defaultValue) {
	if (element.value == defaultValue) {
		element.value = "";
	}
}

moveNav = function() {

	var pos = findPos($('nav'));
	
	var newpos = document.documentElement.scrollTop;
	
	var finishpos = newpos+topOffset;
	
	if(finishpos > 650) {
			finishpos -= 150;
	}
	var thebody = document.body.offsetHeight;
	
	if (finishpos > thebody - bottomLimit) { finishpos = thebody - bottomLimit; }
	if (finishpos < topLimit) { finishpos = topLimit; }
	moveElement('nav', pos[1], finishpos);	
}

moveElement = function(ider, startpos, finishpos, duration) {
	if (duration == null) { duration = _global_duration; }
	var moveby = finishpos - startpos;
	new Effect.MoveBy( 'nav', moveby, 0, { duration: duration, afterFinish: function() { scrolling=false; } });
}

findPos = function(obj) {
	var curleft = curtop = 0;
	if (obj.offsetParent) {
		curleft = obj.offsetLeft;
		curtop = obj.offsetTop;
		while (obj = obj.offsetParent) {
			curleft += obj.offsetLeft;
			curtop += obj.offsetTop;
		}
	}
	return [curleft,curtop];
	
}
	
var leftLimit = 0;		
readCookie = function(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}


hideClass = function(cn, includeOpen) {
	var c = document.documentElement.getElementsByClassName(cn);
	$A(c).each( function(s) {
		if (includeOpen || s.className == cn) {
			s.style.display = "none";
		}
	});
}

			
Event.observe(window, 'load', function() {

	var ck = readCookie('slnav-navposition');
	if (ck) {
		var ffhack = (document.documentElement.clientWidth-229);
		//alert(document.documentElement.clientWidth);
		//alert(ffhack);
		ck=ck-ffhack-3;
		//alert(document.documentElement.clientWidth);
		//alert("u: "+document.documentElement.clientWidth+" o: "+ck);
		//ck=ck-(document.documentElement.clientWidth-962);
//		$('nav').style.left = ck+"px";
	}
	$('nav').style.display = "block";
	
	$('nav').style.top = topLimit+"px";
	


	var all_links = document.documentElement.getElementsByTagName('a');
	//alert (all_links[0]);
	// alert(all_links.length);
	

	


	
	$A(all_links).each( function(el) {
	
	
		var classer = el.className;
		var rel = el.getAttribute('rel');

		if ((rel == null || rel == 'undefined') || (classer.indexOf('noclick') == -1 && rel != 'noclick' && rel.indexOf('gb_imageset[]') == -1 && rel.indexOf('gb_page_center[') == -1 && rel.indexOf('Karte') == -1)) {
			

			el.onclick = function() {
			
				if (classer == 'backlink') {
					history.back();
					
					return false;
					
				}
				else {
					var expires = "";
					var nav_position = findPos($('nav'));
					document.cookie = "slnav-navposition="+nav_position[0]+expires+"; path=/";
				}
			
			}
			
		}
	});
});

Event.observe(window, 'scroll', function() {


	if (!scrolling) {
		scrolling = true;
		setTimeout("moveNav()", 500);
	}
});


/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/* Smooth scrolling
   Changes links that link to other parts of this page to scroll
   smoothly to those links rather than jump to them directly, which
   can be a little disorienting.
   
   sil, http://www.kryogenix.org/
   
   v1.0 2003-11-11
   v1.1 2005-06-16 wrap it up in an object
*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------------------------------------------*/
var ss = {
  fixAllLinks: function() {
    // Get a list of all links in the page
    var allLinks = document.getElementsByTagName('a');
    // Walk through the list
    for (var i=0;i<allLinks.length;i++) {
      var lnk = allLinks[i];
      if ((lnk.href && lnk.href.indexOf('#') != -1) && 
          ( (lnk.pathname == location.pathname) ||
	    ('/'+lnk.pathname == location.pathname) ) && 
          (lnk.search == location.search)) {
        // If the link is internal to the page (begins in #)
        // then attach the smoothScroll function as an onclick
        // event handler
        ss.addEvent(lnk,'click',ss.smoothScroll);
      }
    }
  },

  smoothScroll: function(e) {
    // This is an event handler; get the clicked on element,
    // in a cross-browser fashion
    if (window.event) {
      target = window.event.srcElement;
    } else if (e) {
      target = e.target;
    } else return;

    // Make sure that the target is an element, not a text node
    // within an element
    if (target.nodeName.toLowerCase() != 'a') {
      target = target.parentNode;
    }
  
    // Paranoia; check this is an A tag
    if (target.nodeName.toLowerCase() != 'a') return;
  
    // Find the <a name> tag corresponding to this href
    // First strip off the hash (first character)
    anchor = target.hash.substr(1);
    // Now loop all A tags until we find one with that name
    var allLinks = document.getElementsByTagName('a');
    var destinationLink = null;
    for (var i=0;i<allLinks.length;i++) {
      var lnk = allLinks[i];
      if (lnk.name && (lnk.name == anchor)) {
        destinationLink = lnk;
        break;
      }
    }
    if (!destinationLink) destinationLink = document.getElementById(anchor);

    // If we didn't find a destination, give up and let the browser do
    // its thing
    if (!destinationLink) return true;
  
    // Find the destination's position
    var destx = destinationLink.offsetLeft; 
    var desty = destinationLink.offsetTop;
    var thisNode = destinationLink;
    while (thisNode.offsetParent && 
          (thisNode.offsetParent != document.body)) {
      thisNode = thisNode.offsetParent;
      destx += thisNode.offsetLeft;
      desty += thisNode.offsetTop;
    }
  
    // Stop any current scrolling
    clearInterval(ss.INTERVAL);
  
    cypos = ss.getCurrentYPos();
  
    ss_stepsize = parseInt((desty-cypos)/ss.STEPS);
    ss.INTERVAL =
setInterval('ss.scrollWindow('+ss_stepsize+','+desty+',"'+anchor+'")',10);
  
    // And stop the actual click happening
    if (window.event) {
      window.event.cancelBubble = true;
      window.event.returnValue = false;
    }
    if (e && e.preventDefault && e.stopPropagation) {
      e.preventDefault();
      e.stopPropagation();
    }
  },

  scrollWindow: function(scramount,dest,anchor) {
    wascypos = ss.getCurrentYPos();
    isAbove = (wascypos < dest);
    window.scrollTo(0,wascypos + scramount);
    iscypos = ss.getCurrentYPos();
    isAboveNow = (iscypos < dest);
    if ((isAbove != isAboveNow) || (wascypos == iscypos)) {
      // if we've just scrolled past the destination, or
      // we haven't moved from the last scroll (i.e., we're at the
      // bottom of the page) then scroll exactly to the link
      window.scrollTo(0,dest);
      // cancel the repeating timer
      clearInterval(ss.INTERVAL);
      // and jump to the link directly so the URL's right
      location.hash = anchor;
    }
  },

  getCurrentYPos: function() {
    if (document.body && document.body.scrollTop)
      return document.body.scrollTop;
    if (document.documentElement && document.documentElement.scrollTop)
      return document.documentElement.scrollTop;
    if (window.pageYOffset)
      return window.pageYOffset;
    return 0;
  },

  addEvent: function(elm, evType, fn, useCapture) {
    // addEvent and removeEvent
    // cross-browser event handling for IE5+,  NS6 and Mozilla
    // By Scott Andrew
    if (elm.addEventListener){
      elm.addEventListener(evType, fn, useCapture);
      return true;
    } else if (elm.attachEvent){
      var r = elm.attachEvent("on"+evType, fn);
      return r;
    } else {
      alert("Handler could not be removed");
    }
  } 
}

ss.STEPS = 25;

ss.addEvent(window,"load",ss.fixAllLinks);