/* 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
   v1.1b 2006-01-05 made it Scroll sideways [by raz]
*/

var ss = {
INTERVAL:new String(),
  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.nodeType == 3) {
      target = target.parentNode;
    }
  
    // Paranoia; check this is an A tag
    if (target.nodeName.toLowerCase() != 'a'){
		return;
    }else{
    }
  
    // 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 we didn't find a destination, give up and let the browser do
    // its thing
    if (!destinationLink){
		//return true;
		return;
    }else{
    }
  
    // 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();
    cxpos = ss.getCurrentXPos();
  
    //ss_stepsize = parseInt((desty-cypos)/ss.STEPS);
    ss_stepsize = parseInt((destx-cxpos)/ss.STEPS);
    ss.INTERVAL =
setInterval('ss.scrollWindow('+ss_stepsize+','+destx+',"'+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) {
	//document.title=dest;
    //wascypos = ss.getCurrentYPos();
    var wascxpos;
    var isAbove;
    var iscxpos;
    var isAboveNow;
    wascxpos = ss.getCurrentXPos();
    //isAbove = (wascypos < dest);
    isAbove = (wascxpos < dest);
    //window.scrollTo(0,wascypos + scramount);
    window.scrollTo(wascxpos + scramount,ss.getCurrentYPos());
    //iscypos = ss.getCurrentYPos();
    iscxpos = ss.getCurrentXPos();
    //isAboveNow = (iscypos < dest);
    isAboveNow = (iscxpos < dest);
    //if ((isAbove != isAboveNow) || (wascypos == iscypos)) {
    if ((isAbove != isAboveNow) || (wascxpos == iscxpos)) {
      // 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);
      window.scrollTo(dest,ss.getCurrentYPos());
      // cancel the repeating timer
      clearInterval(ss.INTERVAL);
      // and jump to the link directly so the URL's right
      if(anchor!="none"){
		//I think disable this better ;)
		//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;
  },

  getCurrentXPos: function() {
    if (document.body && document.body.scrollLeft)
      return document.body.scrollLeft;
    if (document.documentElement && document.documentElement.scrollLeft)
      return document.documentElement.scrollLeft;
    if (window.pageXOffset)
      return window.pageXOffset;
    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");
    }
    return true;
  } 
}

ss.STEPS = 25;

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

function walkentry(){
	var destx;
	var anchor;
	var cxpos;
	var ss_stepsize;
	window.scrollTo(0,document.body.offsetHeight);
	ss.STEPS = 100;
    if(ss.getCurrentXPos()<=400){
		destx=400;
    }else{
		window.scrollTo(ss.getCurrentXPos(),document.body.offsetHeight);
		return false;
    }
	anchor="none";
    // Stop any current scrolling
    clearInterval(ss.INTERVAL);
    cxpos = ss.getCurrentXPos();
    //ss_stepsize = parseInt((desty-cypos)/ss.STEPS);
    ss_stepsize = parseInt((destx-cxpos)/ss.STEPS);
    //ss.INTERVAL = setIntferval('if(ss.getCurrentXPos()<=400){ss.scrollWindow('+ss_stepsize+','+destx+',"'+anchor+'")}else{clearInterval(ss.INTERVAL);}',10);
    //Firefox fix or something, dont need the else statement for ie as it always return to the front
    ss.INTERVAL = setInterval('if(ss.getCurrentXPos()<=400){ss.scrollWindow('+ss_stepsize+','+destx+',"'+anchor+'")}else{clearInterval(ss.INTERVAL);}',10);
    return true;
}