var ss = {
  fixAllLinks: function() {
	var allLinks = document.getElementsByTagName('a');
	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)) {
		ss.addEvent(lnk,'click',ss.smoothScroll);
	  }
	}
  },

  smoothScroll: function(e) {
	if (window.event) {
	  target = window.event.srcElement;
	} else if (e) {
	  target = e.target;
	} else return;
	if (target.nodeName.toLowerCase() != 'a') {
	  target = target.parentNode;
	}
	if (target.nodeName.toLowerCase() != 'a') return;
	anchor = target.hash.substr(1);
	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 (!destinationLink) return true;
	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;
	}
	clearInterval(ss.INTERVAL);
	cypos = ss.getCurrentYPos();
	ss_stepsize = parseInt((desty-cypos)/ss.STEPS);
	ss.INTERVAL =
setInterval('ss.scrollWindow('+ss_stepsize+','+desty+',"'+anchor+'")',10);
	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)) {
	  window.scrollTo(0,dest);
	  clearInterval(ss.INTERVAL);
	  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) {
	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 = 50;
ss.transition = 'elastic:out';
ss.addEvent(window,"load",ss.fixAllLinks);