var up_timer
function getPosition(){yoko=document.body.scrollLeft||document.documentElement.scrollLeft;tate=document.body.scrollTop||document.documentElement.scrollTop;}
function pageup(x,y){if(up_timer)clearTimeout(up_timer);if(y>=1){getPosition();var divisionY=(tate-(tate/5));var Y=Math.floor(divisionY);window.scrollTo(yoko,Y);up_timer=setTimeout("pageup("+yoko+","+Y+")",2);}else{window.scrollTo(yoko,0);clearTimeout(up_timer);}}
function scrollup(){getPosition();pageup(yoko,tate)}