// スクローラー
var scroller = {
	targetPosition : 0,
	currentPosition : 0,
	targetId : "",
	scrollSpeed : 80,
	init : function() {
		$('a[href*=#]').click(function(){
			$(this).attr('href').match(/#/g);
			scroller.targetId = RegExp.rightContext;
			scroller.targetPosition = Math.round($('#'+scroller.targetId).offset().top) - 50;
			if (navigator.userAgent.indexOf('iPad') != -1) {
				// iPadでoffset().topの値がスクロール分加わっているバグ対処。
				scroller.targetPosition -= window.scrollY;
			}
			if($(document).height() - $(window).height() < scroller.targetPosition){
				scroller.targetPosition = $(document).height() - $(window).height();
			}
			if (scroller.targetPosition < 0) {scroller.targetPosition = 0;}
			scroller.currentPosition = $(document).scrollTop();
			
//			alert($('body #'+scroller.targetId).offset().top);
			scroller.scroll();
			return false;
		});
	},
	scroll : function() {
		var moveToPosition;
		if(Math.abs(scroller.currentPosition-scroller.targetPosition) <= 1){
			window.scrollTo(0,scroller.targetPosition);
			scroller.currentPosition = 0;
		} else {
			moveToPosition = Math.round(scroller.currentPosition+((scroller.targetPosition-scroller.currentPosition)/3));
			window.scrollTo(0, moveToPosition);
			scroller.currentPosition = moveToPosition;
			setTimeout(scroller.scroll,scroller.scrollSpeed);
		}
	}
}