//rollover
function initRollOverImages() {
  var image_cache = new Object();
  $("img.ro").each(function(i) {
    var imgsrc = this.src;
    var dot = this.src.lastIndexOf('.');
    var imgsrc_on = this.src.substr(0, dot) + '_on' + this.src.substr(dot, 4);
    image_cache[this.src] = new Image();
    image_cache[this.src].src = imgsrc_on;
    $(this).hover(
      function() { this.src = imgsrc_on; },
      function() { this.src = imgsrc; });
  });
}

$(document).ready(initRollOverImages);

//scrolltop
var __scroll = {sp:6, fps:16, timer:0};
function setScrollSp(sp) {
	if(typeof sp == "number") {
		this.__scroll.sp = sp;
	}
}
function setScrollFps(fps) {
	if(typeof fps == "number") {
		this.__scroll.fps = fps;
	}
}
function scrollToTop() {
	pageScroll(0, 0);
}
function getScrollLeft() {
	if(navigator.userAgent.indexOf("MSIE") != -1) {
		return (document.compatMode=="CSS1Compat")?document.documentElement.scrollLeft:document.body.scrollLeft;
	} else {
 	 return (window.pageXOffset) ? window.pageXOffset : 0;
 }
}
function getScrollTop() {
	if(navigator.userAgent.indexOf("MSIE") != -1) {
		return (document.compatMode=="CSS1Compat")?document.documentElement.scrollTop:document.body.scrollTop;
	} else {
 	 return (window.pageYOffset) ? window.pageYOffset : 0;
 }
}
function pageScroll(toX, toY, cuX, cuY) {
	clearTimeout(this.__scroll.timer);
	toX = (!toX || toX < 0) ? 0 : toX;
	toY = (!toY || toY < 0) ? 0 : toY;
	cuX = (!cuX) ? 0 + getScrollLeft() : cuX;
	cuY = (!cuY) ? 0 + getScrollTop() : cuY;
	cuX += (toX - getScrollLeft()) / this.__scroll.sp; 
	cuY += (toY - getScrollTop()) / this.__scroll.sp; 
	if(cuX < 0) { cuX = 0; }
	if(cuY < 0) {	cuY = 0;	}
	window.scrollTo(Math.floor(cuX), Math.floor(cuY));
	if(Math.floor(cuX) != toX || Math.floor(cuY) != toY) {
		this.__scroll.timer = setTimeout("pageScroll("+toX+","+toY+"," +cuX+","+cuY+")",this.__scroll.sp);
	}
}

//easing
$(function() {
	$('a[href*=#]').click(function() {
		if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname) {
			var target = $(this.hash);
			target = target.length && target;
			if (target.length) {
				var sclpos = 30;
				var scldurat = 800;
				var targetOffset = target.offset().top - sclpos;
				$('html,body')
					.animate({scrollTop: targetOffset}, {duration: scldurat, easing: "easeOutExpo"});
				return false;
			}
		}
	});
});