/*--------------------------------------------------------------------------
	 *  Smooth Scroller Script, version 1.0.1
	 *  (c) 2007 Dezinerfolio Inc. <midart@gmail.com>
	 *
	 *  For details, please check the website : http://dezinerfolio.com/
	 *
	/*--------------------------------------------------------------------------*/

	Scroller = {
		// control the speed of the scroller.
		// dont change it here directly, please use Scroller.speed=50;
		speed:10,

		// returns the Y position of the div
		gy: function (d) {
			gy = d.offsetTop
			if (d.offsetParent) while (d = d.offsetParent) gy += d.offsetTop
			return gy
		},

		// returns the current scroll position
		scrollTop: function (){
			body=document.body
		    d=document.documentElement
		    if (body && body.scrollTop) return body.scrollTop
		    if (d && d.scrollTop) return d.scrollTop
		    if (window.pageYOffset) return window.pageYOffset
		    return 0
		},

		// attach an event for an element
		// (element, type, function)
		add: function(event, body, d) {
		    if (event.addEventListener) return event.addEventListener(body, d,false)
		    if (event.attachEvent) return event.attachEvent('on'+body, d)
		},

		// kill an event of an element
		end: function(e){
			if (window.event) {
				window.event.cancelBubble = true
				window.event.returnValue = false
	      		return;
	    	}
		    if (e.preventDefault && e.stopPropagation) {
		      e.preventDefault()
		      e.stopPropagation()
		    }
		},
		
		// move the scroll bar to the particular div.
		scroll: function(d){
			i = window.innerHeight || document.documentElement.clientHeight;
			h=document.body.scrollHeight;
			a = Scroller.scrollTop()
			if(d>a)
				if(h-d>i)
					a+=Math.ceil((d-a)/Scroller.speed)
				else
					a+=Math.ceil((d-a-(h-d))/Scroller.speed)
			else
				a = a+(d-a)/Scroller.speed;
			window.scrollTo(0,a)
		  	if(a==d || Scroller.offsetTop==a)clearInterval(Scroller.interval)
		  	Scroller.offsetTop=a
		},
		// initializer that adds the renderer to the onload function of the window
		init: function(){
			Scroller.add(window,'load', Scroller.render)
		},

		// this method extracts all the anchors and validates then as # and attaches the events.
		render: function(){
			a = document.getElementsByTagName('a');
			Scroller.end(this);
			window.onscroll
		    for (i=0;i<a.length;i++) {
		      l = a[i];
		      if(l.href && l.href.indexOf('#') != -1 && ((l.pathname==location.pathname) || ('/'+l.pathname==location.pathname)) ){
		      	Scroller.add(l,'click',Scroller.end)
		      		l.onclick = function(){
		      			Scroller.end(this);
			        	l=this.hash.substr(1);
			        	 a = document.getElementsByTagName('div');
					     for (i=0;i<a.length;i++) {
					     	if(a[i].id == l){
					     		clearInterval(Scroller.interval);
					     		Scroller.interval=setInterval('Scroller.scroll('+Scroller.gy(a[i])+')',10);
							}
						}
					}
		      	}
			}
		}
	}
	// invoke the initializer of the scroller
	Scroller.init();