//** jQuery Scroll to Top Control script- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com.
//** Available/ usage terms at http://www.dynamicdrive.com (March 30th, 09')
//** v1.1 (April 7th, 09'):
//** 1) Adds ability to scroll to an absolute position (from top of page) or specific element on the page instead.
//** 2) Fixes scroll animation not working in Opera.

var domain = location.hostname+"";
if ( domain.indexOf( "test" ) != -1 ) {
	// 検証
	var mode = "sjnk01test";
} else {
	// 本番
	var mode = "sjnk01";
}

var scrolltotop={
	//startline: Integer. Number of pixels from top of doc scrollbar is scrolled before showing control
	//scrollto: Keyword (Integer, or "Scroll_to_Element_ID"). How far to scroll document up when control is clicked on (0=top).
	setting: {startline:100, scrollto: 0, scrollduration:1000, fadeduration:[500, 100]},
	controlHTML: '<div id="topcontrolwrapper"><div id="topcontrolarea"><p><a title="ページトップへ" href="#wrapper"><img src="./company/'+mode+'/SJNK/common/images/pagetop_off.png" alt="ページトップへ" title="ページトップへ" width="97" height="31" class="png_img" /></a></p></div></div>', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol"
	controlattrs: {offsetx:0, offsety:0}, //offset of control relative to right/ bottom of window corner
	anchorkeyword: '#top', //Enter href value of HTML anchors on the page that should also act as "Scroll Up" links

	state: {isvisible:false, shouldvisible:false},

	scrollup:function(){
		if (!this.cssfixedsupport) //if control is positioned using JavaScript
			this.$control.css({opacity:0}) //hide control immediately after clicking it
		var dest=isNaN(this.setting.scrollto)? this.setting.scrollto : parseInt(this.setting.scrollto)
		if (typeof dest=="string" && jQuery('#'+dest).length==1) //check element set by string exists
			dest=jQuery('#'+dest).offset().top
		else
			dest=0
		this.$body.animate({scrollTop: dest}, this.setting.scrollduration);
	},

	keepfixed:function(){
		var $window=jQuery(window)
		var controlx=$window.scrollLeft() + $window.width() - this.$control.width() - this.controlattrs.offsetx
		var controly=$window.scrollTop() + $window.height() - this.$control.height() - this.controlattrs.offsety
		//this.$control.css({left:controlx+'px', top:controly+'px'})
	},



	togglecontrol:function(){
		var scrolltop=jQuery(window).scrollTop()
		if (!this.cssfixedsupport)
			this.keepfixed()
		this.state.shouldvisible=(scrolltop>=this.setting.startline)? true : false
		if (this.state.shouldvisible && !this.state.isvisible){
			this.$control.stop().animate({opacity:1}, this.setting.fadeduration[0])
			this.state.isvisible=true
		}
		else if (this.state.shouldvisible==false && this.state.isvisible){
			this.$control.stop().animate({opacity:0}, this.setting.fadeduration[1])
			this.state.isvisible=false
		}
	},

	init:function(){
		jQuery(document).ready(function($){
			var mainobj=scrolltotop
			var iebrws=document.all
			mainobj.cssfixedsupport=!iebrws || iebrws && document.compatMode=="CSS1Compat" && window.XMLHttpRequest //not IE or IE7+ browsers in standards mode
			mainobj.$body=(window.opera)? (document.compatMode=="CSS1Compat"? $('html') : $('body')) : $('html,body')
			mainobj.$control=$('<div id="topcontrol">'+mainobj.controlHTML+'</div>')
				.css({position:mainobj.cssfixedsupport? 'fixed' : 'absolute',  opacity:0, cursor:'pointer'})
				.attr({title:'Scroll Back to Top'})
				.click(function(){mainobj.scrollup(); return false})
				.appendTo('body')
			if (document.all && !window.XMLHttpRequest && mainobj.$control.text()!='') //loose check for IE6 and below, plus whether control contains any text
				mainobj.$control.css({width:mainobj.$control.width()}) //IE6- seems to require an explicit width on a DIV containing text
			mainobj.togglecontrol()
			$('a[href="' + mainobj.anchorkeyword +'"]').click(function(){
				mainobj.scrollup()
				return false
			})
			$(window).bind('scroll resize', function(e){
				mainobj.togglecontrol()
			})


			//iphone android の時 高さ判定しない
			if (navigator.userAgent.indexOf("iPhone")>0 || navigator.userAgent.indexOf("iPad") >0 || navigator.userAgent.indexOf("iPod")>0 || navigator.userAgent.indexOf("Android")>0) {
				var windowRoll = $(window),
				topBtn = $('#topcontrol'),
				showFlag = false,
				changeBottom = $(document).height() - window.innerHeight ? window.innerHeight : $(window).height() - 32;
			}
			else {
				var windowRoll = $(window),
				topBtn = $('#topcontrol'),
				showFlag = false,
				changeBottom = $(document).height() - windowRoll.height() - 32;
			}
			windowRoll.scroll(function() {
				if ($(this).scrollTop() <= changeBottom) {
					topBtn.addClass("bottomsmall_t").removeClass("bottomlage_t");
				}
				else {
					topBtn.removeClass("bottomsmall_t").addClass("bottomlage_t");
				}
			});

		})
	}
};
jQuery(function($)
{
	jQuery(window).load(function()
	{
		scrolltotop.init();
	});
});