/* 



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);