/*
moo.fx, simple effects library built with prototype.js (http://prototype.conio.net).
by Valerio Proietti (http://mad4milk.net) MIT-style LICENSE.
for more info (http://moofx.mad4milk.net).
Sunday, March 05, 2006
v 1.2.3
*/

var fx = new Object();
//base
fx.Base = function(){};
fx.Base.prototype = {
	setOptions: function(options) {
	this.options = {
		duration: 500,
		onComplete: '',
		transition: fx.sinoidal
	}
	Object.extend(this.options, options || {});
	},

	step: function() {
		var time  = (new Date).getTime();
		if (time >= this.options.duration+this.startTime) {
			this.now = this.to;
			clearInterval (this.timer);
			this.timer = null;
			if (this.options.onComplete) setTimeout(this.options.onComplete.bind(this), 10);
		}
		else {
			var Tpos = (time - this.startTime) / (this.options.duration);
			this.now = this.options.transition(Tpos) * (this.to-this.from) + this.from;
		}
		this.increase();
	},

	custom: function(from, to) {
		if (this.timer != null) return;
		this.from = from;
		this.to = to;
		this.startTime = (new Date).getTime();
		this.timer = setInterval (this.step.bind(this), 13);
	},

	hide: function() {
		this.now = 0;
		this.increase();
	},

	clearTimer: function() {
		clearInterval(this.timer);
		this.timer = null;
	}
}

//stretchers
fx.Layout = Class.create();
fx.Layout.prototype = Object.extend(new fx.Base(), {
	initialize: function(el, options) {
		this.el = $(el);
		this.el.style.overflow = "hidden";
		this.iniWidth = this.el.offsetWidth;
		this.iniHeight = this.el.offsetHeight;
		this.setOptions(options);
	}
});

fx.Height = Class.create();
Object.extend(Object.extend(fx.Height.prototype, fx.Layout.prototype), {	
	increase: function() {
		this.el.style.height = this.now + "px";
	},

	toggle: function() {
		if (this.el.offsetHeight > 0) this.custom(this.el.offsetHeight, 0);
		else this.custom(0, this.el.scrollHeight);
	},
	show: function() {
		this.custom(0, this.el.scrollHeight);
	}
});

fx.Width = Class.create();
Object.extend(Object.extend(fx.Width.prototype, fx.Layout.prototype), {	
	increase: function() {
		this.el.style.width = this.now + "px";
	},

	toggle: function(){
		if (this.el.offsetWidth > 0) this.custom(this.el.offsetWidth, 0);
		else this.custom(0, this.iniWidth);
	}
});

//fader
fx.Opacity = Class.create();
fx.Opacity.prototype = Object.extend(new fx.Base(), {
	initialize: function(el, options) {
		this.el = $(el);
		this.now = 1;
		this.increase();
		this.setOptions(options);
	},
	increase: function() {
		if (this.now == 1 && (/Firefox/.test(navigator.userAgent))) this.now = 0.9999;
		this.setOpacity(this.now);
	},
	
	setOpacity: function(opacity) {
		if (opacity == 0 && this.el.style.visibility != "hidden") this.el.style.visibility = "hidden";
		else if (this.el.style.visibility != "visible") this.el.style.visibility = "visible";
		if (window.ActiveXObject) this.el.style.filter = "alpha(opacity=" + opacity*100 + ")";
		this.el.style.opacity = opacity;
	},

	toggle: function() {
		if (this.now > 0) {

			this.custom(this.now, 0);
		} 
		else this.custom(0, 1);
	},
	show: function() {
		if (this.now < 1)
		this.custom(this.now,1);
	}
	
});

//transitions
fx.sinoidal = function(pos){
	return ((-Math.cos(pos*Math.PI)/2) + 0.5);
	//this transition is from script.aculo.us
}
fx.linear = function(pos){
	return pos;
}
fx.cubic = function(pos){
	return Math.pow(pos, 3);
}
fx.circ = function(pos){
	return Math.sqrt(pos);
}



/*	smooth scroll
	originally a part of moo.fx.pack, but we don't need much of what's in there right now.
*/

fx.Scroll = Class.create();
fx.Scroll.prototype = Object.extend(new fx.Base(), {
	initialize: function(options) {
		this.setOptions(options);
	},

	scrollTo: function(el){
		var dest = Position.cumulativeOffset($(el))[1];
		var client = window.innerHeight || document.documentElement.clientHeight;
		var full = document.documentElement.scrollHeight;
		var top = window.pageYOffset || document.body.scrollTop || document.documentElement.scrollTop;
		if (dest+client > full) this.custom(top, dest - client + (full-dest));
		else this.custom(top, dest);
	},

	increase: function(){
		window.scrollTo(0, this.now);
	}
});

/*
adds a smooth scroll to all anchor links within the same page  
*/
var ScrollLinks = {
    currentHash: false,
    start: function(){
        this.scroll = new fx.Scroll({duration: 800, onComplete: function(){ScrollLinks.end();}});
        this.allinks = document.getElementsByTagName('a');
        for (i=0; i<this.allinks.length; i++){
            var lnk = this.allinks[i];
            if ((lnk.href && lnk.href.indexOf('#') != -1) && ( (lnk.pathname == location.pathname) || ('/'+lnk.pathname == location.pathname) ) && (lnk.search == location.search)) {
                lnk.onclick = function(){
                    ScrollLinks.scroll.clearTimer();
                    this.initialHref = this.href;
                    this.initialHash = this.hash;
                    this.href = "javascript:void(0)";
                    setTimeout(function(){this.href = this.initialHref;}.bind(this), 200);
                    ScrollLinks.click(this);
                }
            }
        }
    },

    click: function(link){
        this.currentHash = link.initialHash.substr(1);
		if (this.currentHash) this.scroll.scrollTo(this.currentHash);
		return false;
    },

    end: function(){
        window.location.hash = "#"+this.currentHash;
        this.currentHash = false;
		/*
		setting window.location.href will trigger a harmless but annoying bug in safari. 
		It will appear as if the page is loading, when in fact it's not. the activity indicator won't stop spinning etc.
		FIXED in Safari SVN r12598 or newer: http://www.s-seven.net/safari_bug.html#h_value6
		*/
    }
}
function scrollLinks() {
    ScrollLinks.start();
}
Event.observe(window, 'load', scrollLinks, false);


// Modified the members offers, located in the sidebar.
function tilbud() {
	var tilbud = $("tilbud");
	if (!tilbud) return;
	var membersonly = new fx.Opacity($('membersOnly'), {duration: 500});
    //$('membersOnly').style.position='absolute';
    membersonly.hide();
    var disable = new fx.Opacity(tilbud);
    disable.setOpacity(0.25);
	tilbud.onmouseover = function(){
		membersonly.show();
	}
	tilbud.onclick = function(){
		membersonly.toggle();
	}
}
Event.observe(window, 'load', tilbud, false);


// toggle stats
function toggleStats() {
	var stat = $("stats");
	if(!stat) return;
	
	var link = stat.getElementsByTagName("a")[0];
	var toggler = stat.getElementsByTagName("div")[0];
	var togglestats = new fx.Height(toggler , {duration: 400, onComplete:function(){stat.className=(togglestats.now>0)?"open":"";} });
	togglestats.toggle();
	link.onclick = function() {
		if (togglestats.now>0) {
			togglestats.toggle();
			//stat.className = ""
		} else {
			togglestats.show();
			//stat.className = "open"
		}
		link.blur();
		return false;
	}
	
}
Event.observe(window, 'load', toggleStats, false);