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) 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.addEvent(window,"load",ss.fixAllLinks);
function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false ; }
  }}
function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title") ; }
  return null ; }
function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title") ; }
  return null ; }
function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString() ; }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/" ; }
function readCookie(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 ; }
window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title) ; }
window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365) ; }
var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);