function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		btn_01_over = newImage("../common/img/rireki_01over.gif");
		btn_02_over = newImage("../common/img/butokuin_02over.gif");
		btn_03_over = newImage("../common/img/eizou_03over.gif");
		btn_04_over = newImage("../common/img/keiko_04over.gif");
		btn_05_over = newImage("../common/img/kurosawa_05over.gif");
		btn_06_over = newImage("../common/img/irongaibun_06over.gif");
		btn_07_over = newImage("../common/img/movie_07over.gif");
		btn_08_over = newImage("../common/img/eng-button_08over.gif");
		preloadFlag = true;
	}
}

var scrj = 1;
function softScrollBack() {
   if(navigator.appName == "Microsoft Internet Explorer" && document.compatMode == "CSS1Compat") {
      var scdist = document.body.parentNode.scrollTop;
   } else {
      var scdist = document.body.scrollTop;
   }
   if(scrj<50 && scdist) {
      scdist = (scdist>2) ? Math.ceil(scdist*.2) : 1;
      scrj++;
      scrollBy(0,-scdist);
      setTimeout("softScrollBack()",16);
   } else {
      scrollTo(0,0);
      scrj = 1;
   }
}