/*RollOver---------------*/
function initRollovers() {
if (!document.getElementById) return

var preloadImg = new Array();
var TempImg;
var SwapImg = document.getElementsByTagName('img');

for (var i = 0; i < SwapImg.length; i++) {
	if (SwapImg[i].className == 'rollover') {
	var src = SwapImg[i].getAttribute('src');
	var ftype = src.substring(src.lastIndexOf('.'), src.length);
	var hsrc = src.replace(ftype, 'o'+ftype);
	SwapImg[i].setAttribute('hsrc', hsrc);
	preloadImg[i] = new Image();
	preloadImg[i].src = hsrc;

	SwapImg[i].onmouseover = function() {
	TempImg = this.getAttribute('src');
	this.setAttribute('src', this.getAttribute('hsrc'));
}

SwapImg[i].onmouseout = function() {
if (!TempImg) TempImg = this.getAttribute('src').replace('o'+ftype, ftype);
this.setAttribute('src', TempImg);
}

}
}
}

window.onload = initRollovers;

// このページの最初へ
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 / 1.4), Math.floor(y / 1.4));
	if (x > 0 || y > 0) {
		window.setTimeout("backToTop()", 10);
	}
}