var timerUp = '';
function scrollUp(eleId) {
	var inverval = 10;
  var currentScroll = document.getElementById(eleId).scrollTop;
	document.getElementById(eleId).scrollTop = currentScroll - inverval;
	timerUp = setTimeout(function () {
		scrollUp(eleId);
	}, 50);
}

var timerDown = '';
function scrollDown(eleId) {
  var inverval = 10;
  var currentScroll = document.getElementById(eleId).scrollTop;
	document.getElementById(eleId).scrollTop = currentScroll + inverval;
	timerDown = setTimeout(function () {
		scrollDown(eleId);
	}, 50);
}

function scrollAbsoluteTop(eleId) {
	document.getElementById(eleId).scrollTop = 0;
}