<!--
var kyori=null;
var myspeed = 8; 
function SMscroll() { 
   if ((navigator.appName.indexOf("Internet Explorer",0) != -1) && kyori ==null) {
     kyori =  document.body.scrollHeight;
   } else if (window.innerHeight&& kyori ==null) {
     kyori= window.innerHeight;
   }
 var idoukyori = kyori/myspeed;
 var titen = kyori-idoukyori;
 window.scrollTo(0,titen);
 if (titen > 1) {
   var Timer1 = setTimeout("SMscroll()",15);
   kyori = titen; 
 } else {
   kyori=null;
   window.scrollTo(0,0);
 }
}
//-->