/*==============================================
	scrollsmoothly
	Copyright (c) 2008 KAZUMiX
	http://d.hatena.ne.jp/KAZUMiX/
	Licensed under the MIT License:
	http://www.opensource.org/licenses/mit-license.php
==============================================*/
(function(){
	var easing = 0.25;
	var interval = 20;
	var d = document;
	var targetX = 0;
	var targetY = 0;
	var targetHash = '';
	var scrolling = false;
	var splitHref = location.href.split('#');
	var currentHref_WOHash = splitHref[0];
	var incomingHash = splitHref[1];
	var prevX = null;
	var prevY = null;
	addEvent(window, 'load', init);
	function init(){
		setOnClickHandler();
		if(incomingHash){
			if(window.attachEvent && !window.opera){
				setTimeout(function(){scrollTo(0,0);setScroll('#'+incomingHash);},50);
			}else{
				scrollTo(0, 0);
				setScroll('#'+incomingHash);
			}
		}
	}
	function addEvent(eventTarget, eventName, func){
		if(eventTarget.addEventListener){
			eventTarget.addEventListener(eventName, func, false);
		}else if(window.attachEvent){
			eventTarget.attachEvent('on'+eventName, function(){func.apply(eventTarget);});
		}
	}
	function setOnClickHandler(){
		var links = d.links;
		for(var i=0; i<links.length; i++){
			var link = links[i];
			var splitLinkHref = link.href.split('#');
			if(currentHref_WOHash == splitLinkHref[0] && d.getElementById(splitLinkHref[1])){
				addEvent(link, 'click', startScroll);
			}
		}
	}
	function startScroll(event){
		if(event){
			event.preventDefault();
		}else if(window.event){
			window.event.returnValue = false;
		}
		setScroll(this.hash);
	}
	function setScroll(hash){
		var targetEle = d.getElementById(hash.substr(1));
		if(!targetEle)return;
		var ele = targetEle
		var x = 0;
		var y = 0;
		while(ele){
			x += ele.offsetLeft;
			y += ele.offsetTop;
			ele = ele.offsetParent;
		}
		targetX = x;
		targetY = y;
		targetHash = hash;
		if(!scrolling){
			scrolling = true;
			scroll();
		}
	}
	function scroll(){
		var currentX = d.documentElement.scrollLeft||d.body.scrollLeft;
		var currentY = d.documentElement.scrollTop||d.body.scrollTop;
		var vx = (targetX - currentX) * easing;
		var vy = (targetY - currentY) * easing;
		var nextX = currentX + vx;
		var nextY = currentY + vy;
		if((Math.abs(vx) < 1 && Math.abs(vy) < 1) || (prevX === currentX && prevY === currentY)){
			scrollTo(targetX, targetY);
			scrolling = false;
			location.hash = targetHash;
			prevX = prevY = null;
			return;
		}else{
			scrollTo(parseInt(nextX), parseInt(nextY));
			prevX = currentX;
			prevY = currentY;
			var scope = this;
			setTimeout(function(){scroll.apply(scope)},interval);
		}
	}
}());

/*==============================================
	New window Module
==============================================*/
$( function() {
	$('a.blank').click(function(){
		window.open( this.href, '_blank' );
		return false;
	});
});

/*==============================================
	Swap image Module
==============================================*/
$(function() {
	var image_cache = new Object();
	$("img.swap").not("[@src*='_ovr.']").each(function(i) {
		var imgsrc = this.src;
		var dot = this.src.lastIndexOf('.');
		var imgsrc_ovr = this.src.substr(0, dot) + '_ovr' + this.src.substr(dot, 4);
		image_cache[this.src] = new Image();
		image_cache[this.src].src = imgsrc_ovr;
		$(this).hover(function() {
			this.src = imgsrc_ovr;
		}, function() {
			this.src = imgsrc;
		});
	});
});

/*==============================================
	Selector Behavior
==============================================*/
$(function() {
	$('div#topicPath ul li:last').css('background', 'none');
});