[ ▼ 질문관련 참고 Source ]

///////////////////////왼쪽 퀵메뉴////////////////
<script language="javascript">
			<!--
			var lastScrollY = 0;
			var action = window.setInterval('scroll()',10);
			function scroll() {
				var diffTop = 0;
				var diffLeft = 0;
				var percent = 0;

				var diffY = Math.max(document.documentElement.scrollTop, document.body.scrollTop);
				var diffX = 0;

				if (diffY != lastScrollY) {
					percent = .1 * (diffY - lastScrollY);
					if (percent > 0) {
						percent = Math.ceil(percent);
					} else {
						percent = Math.floor(percent);
					}
					
					diffTop = parseInt(document.getElementById("floaters").style.top) + percent;
					document.getElementById("floaters").style.top = diffTop;

					lastScrollY = lastScrollY + percent;
				}
			}
			//-->
			</script>



///////////////////////오른쪽 퀵메뉴////////////////


<script type="text/javascript">
function change_display(id) {
	for(i=1; i<=2; i++) {
		someone = document.getElementById('blue_'+i).style;
		if(i === id) {
			someone.display='';
		} else {
			someone.display='none';
		}
	}
}



window.onload = scrollHandler;
			
			function scrollHandler() {
				
				var offsetX =2;
				var offsetY = 110;

				var objVisible = document.getElementById("alwaysVisible");
				var targetY = document.body.scrollTop + offsetY;
				var currentY = parseInt(objVisible.style.top);
				
				if (currentY != targetY) {
					objVisible.style.left = offsetX;
					var scrollAmount = Math.ceil( Math.abs(targetY - currentY) / 20 )
					
					if (currentY > targetY) {
						objVisible.style.top = currentY - scrollAmount;
					}
					else {
						objVisible.style.top = currentY + scrollAmount;
					}
				}
				setTimeout(scrollHandler, 10);
			}


</script>