// ____________________________pagetop

function pagetop() {
	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("pagetop()", 10);
	}
}


var yomotsuRollover = {
	
	main : function() {
		var img = document.images;
		for (var i = 0; i <img.length; i++) {
			if ((img[i].src.match(/_n\./))||(img[i].style.filter)){
				img[i].onmouseover = yomotsuRollover.over;
				img[i].onmouseout  = yomotsuRollover.out;
			}
		}
	},

	over : function() {
		if((this.style.filter)&&(this.style.filter.match(/_n\.png/))){//(IE5.5-6 && png)
			this.style.filter = this.style.filter.replace('_n.png', '_r.png');
		}
		else{
			this.src = this.src.replace('_n.', '_r.');
		}
	},

	out : function(){
		if((this.style.filter)&&(this.style.filter.match(/_r\.png/))){//(IE5.5-6 && png)
			this.style.filter = this.style.filter.replace('_r.png', '_n.png');
		}
		else{
			this.src = this.src.replace('_r.', '_n.');
		}
	},

	addEvent : function(){
		try {
			window.addEventListener('load', yomotsuRollover.main, false);
		} catch (e) {
			window.attachEvent('onload', yomotsuRollover.main);
		}
	}
}

yomotsuRollover.addEvent();