//エンコーディング@UTF-8

function ipnGetScrlY() {
	if(window.scrollY)
		return window.scrollY;

	else if(window.pageYOffset)
		return window.pageYOffset;

	else if(document.documentElement && document.documentElement.scrollTop)
		return document.documentElement.scrollTop;

	else if(document.body && document.body.scrollTop)
		return document.body.scrollTop;

	return 0;
}

function ipnScrl() {
	var goto = Math.floor(ipnGetScrlY() * 0.9);
	window.scrollTo(0, goto);

	if(goto != 0)
		setTimeout("ipnScrl()", 10);
}

ipnAddListener(window, "load", function() {
	ipnAddListener(document.getElementById("btn"), "click", ipnScrl);

	ipnAddListener(document.getElementById("style"), "change", ipnChgStyle);
} );