// Place your application-specific JavaScript functions and classes here
// This file is automatically included by javascript_include_tag :defaults

function linksInDiv(id){
	return document.getElementById(id).getElementsByTagName('a');
}

/**
 * @author Administrator
 */
	var easing = 0.3;
 var interval = 10;
 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 initInDiv(domId){
	var anchorLinks = linksInDiv(domId);
	for(var i=0;i<anchorLinks.length;i++){
		var link = anchorLinks[i];
		var splitedLinkHref = link.href.split('#');
		if(d.getElementById(splitedLinkHref[1])){
			addEvent(link, 'click', startScroll);
		}
	}
}

	 
 function init(){
	setOnClickHandler()
	
	if(incomingHash){
       if(window.attachEvent && !window.opera){
         // IEの場合はちょっと待ってからスクロール
         setTimeout(function(){scrollTo(0,0);setScroll('#'+incomingHash);},50);
       }else{
         // IE以外はそのままGO
         scrollTo(0, 0);
         setScroll('#'+incomingHash);
       }
     }
	
	
	
}
 function setOnClickHandler(){
     var links = d.links;
     for(var i=0; i<links.length; i++){
       // ページ内リンクならスクロールさせる
       var link = links[i];
       var splitLinkHref = link.href.split('#');
       if(currentHref_WOHash == splitLinkHref[0] && d.getElementById(splitLinkHref[1])){
         addEvent(link, 'click', startScroll);
       }
     }
   }
// イベントを追加する関数
   function addEvent(eventTarget, eventName, func){
     if(eventTarget.addEventListener){
       // モダンブラウザ
       eventTarget.addEventListener(eventName, func, false);
     }else if(window.attachEvent){
       // IE
       eventTarget.attachEvent('on'+eventName, function(){func.apply(eventTarget);});
     }
   }
	  function getScrollMaxXY() {
     if(window.scrollMaxX && window.scrollMaxY){
       return {x:window.scrollMaxX, y:window.scrollMaxY};
     }
     var documentSize = getDocumentSize();
     var windowSize = getWindowSize();
     return {x:documentSize.width - windowSize.width, y:documentSize.height - windowSize.height};
   }
   function startScroll(event){
     // リンクのデフォルト動作を殺す
     if(event){ // モダンブラウザ
       event.preventDefault();
       //alert('modern');
     }else if(window.event){ // IE
       window.event.returnValue = false;
       //alert('ie');
     }
     // thisは呼び出し元になってる
     setScroll(this.hash);
   }

   function setScroll(hash){
     // ハッシュからターゲット要素の座標をゲットする
     var targetEle = d.getElementById(hash.substr(1));
     if(!targetEle)return;
     //alert(scrollSize.height);
     // スクロール先座標をセットする
     var ele = targetEle;
     var x = 0;
     var y = 0;
     while(ele){
       x += ele.offsetLeft;
       y += ele.offsetTop;
       ele = ele.offsetParent;
     }
     var maxScroll = getScrollMaxXY();
     targetX = Math.min(x, maxScroll.x);
     targetY = Math.min(y, maxScroll.y);
     targetHash = hash;
     // スクロール停止中ならスクロール開始
     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)){
       // 目標座標付近に到達していたら終了
       scrollTo(targetX, targetY);
       scrolling = false;
       location.hash = targetHash;
       prevX = prevY = null;
       return;
     }else{
       // 繰り返し
       scrollTo(parseInt(nextX), parseInt(nextY));
       prevX = currentX;
       prevY = currentY;
       setTimeout(function(){scroll()},interval);
     }
   }
	 function getWindowSize(){
     var result = {};
     if(window.innerWidth){
       var box = d.createElement('div');
       with(box.style){
         position = 'absolute';
         top = '0px';
         left = '0px';
         width = '100%';
         height = '100%';
         margin = '0px';
         padding = '0px';
         border = 'none';
         visibility = 'hidden';
       }
       d.body.appendChild(box);
       var width = box.offsetWidth;
       var height = box.offsetHeight;
       d.body.removeChild(box);
       result = {width:width, height:height};
     }else{
       result = {width:d.documentElement.clientWidth || d.body.clientWidth, height:d.documentElement.clientHeight || d.body.clientHeight};
     }
     return result;
   }
	 function getDocumentSize(){
     return {width:Math.max(document.body.scrollWidth, document.documentElement.scrollWidth), height:Math.max(document.body.scrollHeight, document.documentElement.scrollHeight)};
   }