간단한 위로가기 자바스크립트 입니다.

<a href=javascript:scrollUp()>위로</a>
 
<script>
var scrollUpDelay = 1;
var scrollUpSpeed = 30;
 
function scrollUp()
{
 if(document.body.scrollTop<1)
 {
 return;
 }
 
document.body.scrollTop=document.body.scrollTop-scrollUpSpeed;
 
setTimeout('scrollUp()',scrollUpDelay);
}
</script>