//-------------------------------------------------------------------->
//- file   : scroll.js
//- admin  : MEGA-D Inc. Kimoto Tatsuro
//- update : 20060206
//- desc   : page scroll
//- var    : 1.0
//-------------------------------------------------------------------->

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

function movePosition() {
  position = Math.floor(position*0.8);
  if( position > 0.1 ){
    window.scrollTo(0,position)
    setTimeout("scrollToTop()",30);
  } else {
    window.scrollTo(0,0);
  }
}