//-------------------------------------------------------------------->
//- file   : scroll.js
//- admin  : MEGA-D Inc. Kimoto Tatsuro
//- update : 20070215
//- desc   : page scroll
//- var    : 1.0
//-------------------------------------------------------------------->

function scrollToTop() {
	var IE  = navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1;
	if( IE ){
		position = document.body.scrollTop + document.documentElement.scrollTop;
	} else {
		position = window.pageYOffset;
	}
	movePosition();
}

function movePosition() {
	position = Math.floor(position * 0.7);
	if( position > 1 ){
		window.scrollTo(0, position)
		setTimeout("scrollToTop()", 30);
	} else {
		window.scrollTo(0,0);
	}
}