// JavaScript Document

//ロールオーバー
function smartOver() {
smartRollover('g_navi');
smartRollover('container');
}

function smartRollover(idName) {
if (!document.getElementById(idName)) { return false; }
if(document.getElementsByTagName) {
var images = document.getElementById(idName).getElementsByTagName("img");
for(var i=0; i < images.length; i++) {

if(images[i].getAttribute("src").match(/_off\./))
{
fileName = new Array(images[i].getAttribute("src").replace("_off.", "_on."));
preImages = new Array();
for (j=0; j<fileName.length; j++)
{
preImages[j] = new Image();
preImages[j].src = fileName[j];
}

images[i].onmouseover = function() {
this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));
}
images[i].onmouseout = function() {
this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));
}
}
}
}
}
if(window.addEventListener) {
window.addEventListener("load", smartOver, false);
}
else if(window.attachEvent) {
window.attachEvent("onload", smartOver);
}
else{
window.onload = smartOver;
}


//PAGE TOPボタン
function backToTop() {
var x1 = x2 = x3 = 0;
var y1 = y2 = y3 = 0;
if (document.documentElement) {
x1 = document.documentElement.scrollLeft || 0;
y1 = document.documentElement.scrollTop || 0;
}
if (document.body) {
x2 = document.body.scrollLeft || 0;
y2 = document.body.scrollTop || 0;
}
x3 = window.scrollX || 0;
y3 = window.scrollY || 0;
var x = Math.max(x1, Math.max(x2, x3));
var y = Math.max(y1, Math.max(y2, y3));
window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));
if (x > 0 || y > 0) {
window.setTimeout("backToTop()", 25);
}
}