/* 


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);