/* 

最上部までスムーズにスクロール

*/



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); 

} 

} 





/* 

ロールオーバー用JS

xxx_off.jpg ＝　元画像

xxx_over.jpg ＝　マウスON時画像

*/



function setRollOver() {

	if (!document.getElementsByTagName) return false;

	var ovrImgList = document.getElementsByTagName('img');

	for (var i = 0; i < ovrImgList.length; i++) {

		if (ovrImgList[i].src.match(/_off\./i)) {

			var loadedImg = new Image();

			loadedImg.src = ovrImgList[i].src.replace(/_off\./i, '_over.');

			ovrImgList[i].onmouseover = function() { 

				this.src = this.src.replace(/_off\./i, '_over.');

			}

			ovrImgList[i].onmouseout = function() { 

				this.src = this.src.replace(/_over\./i, '_off.');

			}

			ovrImgList[i].onmouseup = function() { 

				this.src = this.src.replace(/_over\./i, '_off.');

			}

		}

	}

	return true;

}

if (window.addEventListener) window.addEventListener('load', setRollOver, false);

if (window.attachEvent) window.attachEvent('onload', setRollOver);