function scrolley(towhich){
	//alert(MooTools.version);
	
	var winScroller = new Fx.Scroll(window, {transition: Fx.Transitions.Quart.easeInOut, duration:1000});
	/*	scroll to the top	*/
	//winScroller.toBottom();

	winScroller.toElement(towhich);
	//alert("scrolled to " + towhich);

}

window.onload = function(){
	registerNextlinks();
}

function registerNextlinks(){
	var nextlinks = getElementsByClassName("nextlink");
	for (var i=0; i< nextlinks.length; i++){
		nextlinks[i].onclick = function(){
			nextSection(this);
			return false;
		}		
	}
	
	var prevlinks = getElementsByClassName("prevlink");
	for (var i=0; i< prevlinks.length; i++){
		prevlinks[i].onclick = function(){
			prevSection(this);
			return false;
		}		
	}

}


function nextSection(which){
	//which.style.backgroundColor = "#FF6600";
	myid = which.parentNode.parentNode.id.substr(1);
	nextid = "s"+(parseInt(myid)+1);
	//alert("parent: " + nextid);
	if(document.getElementById(nextid)){
		scrolley(nextid);
	}else{
		scrolley("s0");
	}
}


function prevSection(which){
	//which.style.backgroundColor = "#FF6600";
	myid = which.parentNode.parentNode.id.substr(1);
	nextid = "s"+(parseInt(myid)-1);
	//alert("nextid: " + nextid);
	if(document.getElementById(nextid)){
		scrolley(nextid);
	}else{
		scrolley("s0");
	}
}



function sethash(towhat){
	//if(navigator.appVersion.indexOf('AppleWebKit') >0){

	//window.parent.location.hash = towhat;


		var df=document.createElement('form');
		df.setAttribute("method","get");
		df.setAttribute("action", "#"+towhat);
		window.parent.document.body.appendChild(df);
		df.submit();
		//document.body.removeChild(df);
		

	//var former = window.parent.document.getElementsByName("safariform");
	//alert(former);

}



function openMenu(which){
		collapseMenus();
		var menu = document.getElementById(which + "_Menu");
        menu.parentNode.style.backgroundImage = "url(images/on.png)";
        menu.style.display = "block";
}


function collapseMenus(){
	var allmenus = document.getElementsByTagName("ul");
	for(var i in allmenus){
		//alert(allmenus[i].className);
		if(allmenus[i].className == "submenu"){
			//alert("collapsing " + i)
			allmenus[i].parentNode.style.backgroundImage = "url(images/off.png)";
			allmenus[i].style.display = "none";
		}

	}
}







/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/
var getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};