/*  ================================================================================
 *
 *  JavaScript -Page Scroller version 2.0.0
 *  (c) 2007 coliss.com
 *
 *  この作品は、クリエイティブ・コモンズの表示-非営利-継承 2.1 日本ライセンスの下で
 *  ライセンスされています。
 *  この使用許諾条件を見るには、http://creativecommons.org/licenses/by-nc-sa/2.1/jp/を
 *  チェックするか、クリエイティブ･コモンズに郵便にてお問い合わせください。
 *  住所は：559 Nathan Abbott Way, Stanford, California 94305, USA です。
 *
================================================================================  */


/*  ================================================================================
TOC
====================================================================================
Set Up Object
Get Attribute
Page Scroller
Setup Attribute
================================================================================  */


/*  ================================================================================
Set Up Object
================================================================================  */
	bAgent = navigator.userAgent;
	bName = navigator.appName;
	bPlugins = navigator.plugins;
	
	w = window;
	s = w.screen;
	d = document;
	
	usrUrl = location.href;

	function sniffer(){
		/* OS */
		this.Win = bAgent.indexOf("Win",0) != -1 ? 1 : 0;
		this.WinVista = bAgent.indexOf("Windows NT 6.0",0) != -1 ? 1 : 0;
		this.Mac = bAgent.indexOf("Mac",0) != -1 ? 1 : 0;
		this.MacOSX = ((bAgent.indexOf("Mozilla") != -1) && (bAgent.indexOf("Mac OS X") != -1)) ? 1 : 0;
		if(bPlugins){for(i = 0 ;i < bPlugins.length;i++){if(this.Mac && (bPlugins[i].filename.indexOf("QuickTime Plugin.plugin") != -1)){this.MacOSX = true;}}}
		
		/* Browser */
		this.IE        = ((bAgent.indexOf("MSIE") != -1) && (bAgent.indexOf("Opera") == -1)) ? 1 : 0;
		this.NS        = ((bName == "Netscape") && (bAgent.indexOf("Opera") == -1)) ? 1 : 0;
		this.NC        = ((bName == "Netscape") && (bAgent.indexOf("Gecko") == -1) && (bAgent.indexOf("Opera") == -1)) ? 1 : 0;
		this.Gecko     = (bAgent.indexOf("Gecko") != -1) ? 1 : 0;
		this.Moz       = ((bAgent.indexOf("Gecko") != -1) && (bAgent.indexOf("Safari",0) == -1)) ? 1 : 0;
		this.OPERA     = bAgent.indexOf("Opera",0) != -1 ? 1 : 0;
		this.Firefox   = (bAgent.indexOf("Firefox") != -1) ? 1 : 0;
		this.SAFARI    = bAgent.indexOf("Safari",0) != -1 ? 1 : 0;
		this.ICAB      = bAgent.indexOf("iCab",0) != -1 ? 1 : 0;
		
		/* Object */
		/* SAFARI,Firefox,NS6+,OPERA6=4, IE5+,OPERA5,7+=3, IE4=2, NS4=1, others=0 */
		this.checkObj      = d.all ? (d.getElementById ? 3 : 2) : (d.getElementById ? 4 : (d.layers ? 1 : 0));
		this.checkObj4     = (d.getElementById && !d.all) ? 1 : 0;
		this.checkObj3     = (d.getElementById && d.all) ? 1 : 0;
		this.checkObj2     = (d.all && !d.getElementById) ? 1 : 0;
		this.checkObj1     = d.layers ? 1 : 0;
		this.allObj        = ((this.checkObj == 3) || (this.checkObj == 4));
		
		/* Compat Mode */
		this.modeStandard  = d.compatMode == "CSS1Compat" ? 1 : 0;
		this.modeQuirks    = d.compatMode == "BackCompat" ? 1 : 0;
		
		/* Each Browser */
		this.IE5           = (this.Win && this.IE && (bAgent.indexOf('MSIE 5.',0) != -1));
		this.IE55          = (this.Win && this.IE && (bAgent.indexOf('MSIE 5.5.',0) != -1));
		this.IE55later     = (this.Win && this.IE && (w.createPopup != -1));
		this.IE6           = (this.Win && this.IE && (bAgent.indexOf('MSIE 6.',0) != -1));
		this.IE6below      = (this.IE5 && this.IE55 && this.IE6);
		this.IE7           = (this.Win && this.IE && (bAgent.indexOf('MSIE 7.',0) != -1));
		
		this.WinIEs        = (this.Win && this.IE && this.modeStandard);
		this.WinIEq        = (this.Win && this.IE && this.modeQuirks);
		this.Fxs        = (this.Firefox && this.modeStandard);
		this.Fxq        = (this.Firefox && this.modeQuirks);
		
		this.MacFirefox    = (this.Mac && this.Firefox);
		this.MacOPERA      = (this.Mac && this.OPERA);
		
		return this;
	}
	var usr = new sniffer;


/*  ================================================================================
Get Attribute
================================================================================  */
	function setObj(idName){
		return d.getElementById ? d.getElementById(idName) : d.all(idName);
	}

	function getScreenSize(type){
		if(type == "width"){
			if(usr.allObj){
				return(s.width);
			}
		}else if(type == "height"){
			if(usr.allObj){
				return(s.height);
			}
		}
	}

	function getBrowseSize(type){
		if(type == "width"){
			if(w.innerWidth){
				return(w.innerWidth);
			}else if(usr.modeStandard && d.documentElement.clientWidth){
				return(d.documentElement.clientWidth);
			}else{
				return(d.body.clientWidth);
			}
		}else if(type == "height"){
			if(w.innerHeight){
				return(w.innerHeight);
			}else if(usr.modeStandard && d.documentElement.clientHeight){
				return(d.documentElement.clientHeight);
			}else{
				return(d.body.clientHeight);
			}
		}
	}

	function getBodySize(type){
		if(type == "width"){
			if(usr.allObj){
				return(d.body.scrollWidth);
			}
		}else if(type == "height"){
			if(usr.allObj){
				return(d.body.scrollHeight);
			}
		}
	}

	function getDocumentSize(type){
		if(type == "width"){
			if(usr.allObj){
				return(d.getElementById('MAIN').offsetWidth);
			}
		}else if(type == "height"){
			if(usr.allObj){
				return(d.getElementById('MAIN').offsetHeight);
			}
		}
	}

	function getWindowOffset(type){
		if(type == "x"){
			if(usr.SAFARI){
				return(window.pageXOffset);
			}else if(usr.Firefox){
				return(w.scrollX);
			}else if((usr.checkObj == 3) && (!usr.WinIEs)){
				return(d.body.scrollLeft);
			}else if((usr.checkObj == 4) || (usr.WinIEs)){
				return(d.body.parentNode.scrollLeft);
			}
		}else if(type == "y"){
			if(usr.SAFARI){
				return(window.pageYOffset);
			}else if(usr.Firefox){
				return(w.scrollY);
			}else if((usr.checkObj == 3) && (!usr.WinIEs)){
				return(d.body.scrollTop);
			}else if((usr.checkObj == 4) || (usr.WinIEs)){
				return(d.body.parentNode.scrollTop);
			}
		}
	}

	function getScrollRange(type){
		if(type == "x"){
			if(usr.allObj){
				return (getDocumentSize('width') - getBrowseSize('width'));
			}
		}else if(type == "y"){
			if(usr.allObj){
				return (getDocumentSize('height') - getBrowseSize('height'));
			}
		}
	}

	function getElementPosition(type,idName){
		var obj = setObj(idName);
		var tagCoords = new Object();
		if(type == "left"){
			if(usr.allObj){
				tagCoords.x = obj.offsetLeft;
				while((obj = obj.offsetParent) != null){
					tagCoords.x += obj.offsetLeft;
				}
			}if((tagCoords.x * 0) == 0){
				return(tagCoords.x);
			}else{
				return(idName);
			}
		}else if(type == "top"){
			if(usr.allObj){
				tagCoords.y = obj.offsetTop;
				while((obj = obj.offsetParent) != null){
					tagCoords.y += obj.offsetTop;
				};
			}if((tagCoords.y * 0) == 0){
				if(usr.Mac && usr.SAFARI){		// temp
					return(tagCoords.y + 0);
				}else{
					return(tagCoords.y);
				}
			}else{
				return(idName);
			}
		}
	}

	function getElementSize(type,idName){
		if(type == "width"){
			if(usr.allObj){
				return(d.getElementById(idName).clientWidth);
			}
		}else if(type == "height"){
			if(usr.allObj){
				return(d.getElementById(idName).clientHeight);
			}
		}
	}


/*  ================================================================================
Page Scroller
================================================================================  */
	var pageScrollTimer;
	function pageScroll(toX,toY,frms,frX,frY){
		if(pageScrollTimer)clearTimeout(pageScrollTimer);
		var spd = usr.Mac?14:16;
		var actX = getWindowOffset('x');
		var actY = getWindowOffset('y');
		if(!toX || toX < 0)toX = 0;
		if(!toY || toY < 0)toY = 0;
		if(!frms)frms = (usr.Mac && (usr.OPERA || usr.NS6)) ? 3 : usr.NS6 ? 4 : usr.NS ? 7 : 5;
		if(!frX)frX = 0 + actX;
		if(!frY)frY = 0 + actY;

		frX += (toX - actX) / frms;
		if(frX < 0)frX = 0;
		frY += (toY - actY) / frms;
		if(frY < 0)frY = 0;
		var posX = Math.ceil(frX);
		var posY = Math.ceil(frY);
		w.scrollTo(posX, posY);
		if((Math.floor(Math.abs(actX - toX)) < 1) && (Math.floor(Math.abs(actY-toY)) < 1)){
			clearTimeout(pageScrollTimer);
			w.scroll(toX,toY);
		}else if((posX != toX) || (posY != toY)){
			pageScrollTimer = setTimeout("pageScroll("+toX+","+toY+","+frms+","+frX+","+frY+")",spd);
		}else{
			clearTimeout(pageScrollTimer);
		}
	}

	function toAnchor(idName,longitudinalAdj,traverser){
		if(usr.allObj){
			if(!!idName){
				var anchorX = traverser ? getElementPosition('left',idName) : 0;
				var anchorY = longitudinalAdj ? getElementPosition('top',idName) - longitudinalAdj : getElementPosition('top',idName) - 0;
				var dMaxX = getScrollRange('x');
				var dMaxY = getScrollRange('y');
				if(((anchorX*0) == 0) || ((anchorY*0) == 0)){
					var setX = (anchorX < 1) ? 0 : (anchorX > dMaxX) ? dMaxX : anchorX;
					var setY = (anchorY < 1) ? 0 : (anchorY > dMaxY) ? dMaxY : anchorY;
					pageScroll(setX,setY);
				}else{
					location.hash = idName;
				}
			}else{
				pageScroll(0,0);
			}
		}else{
			!!idName ? location.hash = idName : location.hash = "top";
		}
	}

	var checkAnchor = usrUrl.indexOf("#",0);
	var checkPageScroller = usrUrl.match("pSc");
	function initializePage(){
		if(!!checkPageScroller){
			anchorId = usrUrl.substring(usrUrl.lastIndexOf("?pSc")+4,usrUrl.length);
			timerID=setTimeout("toAnchor(anchorId,13)",400);
		}
		if(!checkAnchor){
			window.scroll(0,0);
		}else return true;
	}


/*  ================================================================================
Setup Attribute
================================================================================  */
	function initializeScript(){
		screenSizeWidth     = getScreenSize('width');
		screenSizeHeight    = getScreenSize('height');
		browseSizeWidth     = getBrowseSize('width');
		browseSizeHeight    = getBrowseSize('height');
		bodySizeWidth       = getBodySize('width');
		bodySizeHeight      = getBodySize('height');
		documentSizeWidth   = getDocumentSize('width');
		documentSizeHeight  = getDocumentSize('height');
		windowOffsetX       = getWindowOffset('x');
		windowOffsetY       = getWindowOffset('y');
		scrollRangeX        = getScrollRange('x');
		scrollRangeY        = getScrollRange('y');
	}

	window.onload = function(e){
		if(usr.allObj)initializeScript();initializePage();
	}
	window.onresize = function(e){
		if(usr.allObj)initializeScript();initializePage();
	}