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Show button when scroll up [JS]

I would like to show the button when scroll up. My current script doing this but I have to scroll to the top, and then the button appears. Is there any possible to show the button just shortly after I scrolling up the page?
<script>
function showButton() {
var button = $('#my-button'), //button that scrolls user to top
view = $(window),
timeoutKey = -100;
$(document).on('scroll', function() {
if(timeoutKey) {
window.clearTimeout(timeoutKey);
}
timeoutKey = window.setTimeout(function(){
if (view.scrollTop() > 10) {
button.fadeOut();
}
else {
button.fadeIn();
}
}, 10);
});
}
$('#my-button').on('click', function(){
$('html, body').stop().animate({
scrollTop: 10
}, 10, 'linear');
return false;
});
//call function on document ready
$(function(){
showButton();
});
</script>

You should use offset().top instead of scrollTop()

How to hide an element when it has reached another element on scroll down?

I have a fixed button on bottom: 0 that performs a scroll to another element, when clicked, but I need to hide it, when it reaches that element and make it appear again, when it scrolls over that element.
How could I do this with jQuery?
I've done this so far, but it isn't enough.
function hideScroller () {
div1 = $('#form');
div2 = $('#slide-to-contacts');
div1FromTop = div1.offset().top;
div2FromTop = $('body').scrollTop();
if (div1FromTop <= div2FromTop) div2.hide();
else div2.show();
}
A rough estimate http://jsfiddle.net/ydbev5rq/5/

Works mostly as expected I think, just an incorrect selector for div2. Best to use $(window).scrollTop() or if you must $('html, body').scrollTop() by the way.
Update - adjustment for when toggling triggers :
http://jsfiddle.net/ydbev5rq/7/
div2FromTop = $(window).scrollTop()+$(window).height();
Of course, using a $(this) when you can never hurts...
div2FromTop = $(this).scrollTop()+$(this).height();

With your code it's solved.just changed div2 id and made >= to < and div1.scrollTop() to offset().top.
Here is the js code
function hideScroller() {
div1 = $('#form');
div2 = $('#scroll-to-contacts');
div1FromTop = div1.offset().top;
div2FromTop = $('#scroll-to-contacts').offset().top;
if (div1FromTop < div2FromTop) div2.hide();
else div2.show();
}
$(document).ready(function () {
//hideScroller();
form = $('#form');
$('#scroll-to-contacts').click(function () {
$('html, body').animate({
scrollTop: form.offset().top
}, 1000);
});
});
$(window).scroll(function () {
hideScroller();
});

preventing from animating further on some event

I've got this code here:
$(document).ready(function()
{
$("#nav_items > p:first-child").click(function()
{
$('html,body').animate(
{
scrollTop: $('#main_div').offset().top
}, 500);
});
$("#nav_items > p:last-child").click(function()
{
$('html,body').animate(
{
scrollTop: $('#about_us').offset().top
}, 800);
});
});
On element(p) click it scrolls the document to a #main_div or #about_us element. How can I stop it from keep on scrolling if I for example start scrolling with my mouse wheel?

You can listen to the mousewheel event and use the stop method:
$(window).on('mousewheel', function() {
$('body, html').stop();
});

Here is a method, combining the use of $(window).scroll() and $('body').on('mousewheel'), that will demonstrate how to do what you wish:
jsFiddle Demo
var scrollPause = 0;
menuItems.click(function(e){
var href = $(this).attr("href"),
offsetTop = href === "#" ? 0 : $(href).offset().top-topMenuHeight+1;
scrollPause = 1;
$('html, body').stop().animate({
scrollTop: offsetTop
}, 300, function(){
setTimeout(function(){
scrollPause = 0;
},5000);
});
e.preventDefault();
});
$('body').on({
'mousewheel': function(e) {
if (scrollPause == 0) return;
e.preventDefault();
e.stopPropagation();
}
})
Notes:
In the jsFiddle, the sp div is used to visually show status of the scrollPause variable
Upon clicking a top menu item, the scrollPause is set to 0 (disallow scroll) and a setTimeout is used to re-enable it after an 8-second pause. Therefore, immediately after the scroll-to-element, mouse wheel scroll will be disabled for 8 seconds.

scrollTop not working in firefox and IE

I have some problem with scrolltop in firefox and IE
I used scrolltop more than 2 time in my code in part one it works but in part two it doesnt
I have two arrows "next" and "prev" which when clicking on them page scroll to specific part,
I cant find how can I fix it?
jquery :
var lchiled=$("ul#portfolio li").last();
var fchiled=$("ul#portfolio li").first();
$('li.section').first();
$("ul#portfolio li:first-child").addClass("current");
$('a.display').on('click', function(e) {
e.preventDefault();
var t = $(this).attr('name');
that = $(this);
if (t === 'next') {
if($('.current').next('.section').length==0)
var $next = $('li.section').first();
else
var $next = $('.current').next('.section');
var top = $next.offset().top -65;
$('.current').removeClass('current');
$('body,html').animate({
scrollTop: top,
},
function () {
$next.addClass('current');
// alert(top);
});
}
else if (t === 'prev' && $('.current').prev('li.section').length > 0) {
var $prev = $('.current').prev('.section');
var top = $prev.offset().top -65;
$('.current').removeClass('current');
$('body').animate({
scrollTop: top,
}, function () {
$prev.addClass('current');
});
}
});
html :
<div id="container">
<ul id="portfolio" class="clearfix">
</ul>
</div>
lis are dynamically produce with jquery codes

It must be like this
$('body,html').animate({
scrollTop: top,
}, function () {
$prev.addClass('current');
});
insted of
$('body').animate({
scrollTop: top,
}, function () {
$prev.addClass('current');
});
I forget to update the prev part so this problem happened.

You use .animate on scrollTop in two places. In one, you (correctly) use html,body as the selector. In the other, you only use body. And you wonder why it doesn't work in some browsers ;)

try var offset = $(window).scrollTop(); this .

You can use window.scrollTo(x,y)

How to scroll page on multiple ID in js

Please check what i did yet http://jsfiddle.net/dUVmh/1/ .
About the animation i want to achieve is that:
When you first scroll down the page then window scroll to #green DIV. After that if you again scroll down window scroll to #yellow DIV & same at the time of scrollup (fom #yellow to #green).
About the issue:
You can see the animation it's stuck on #green DIV.
$(window).scroll(function(){
if($(this).scrollTop() > 0) {
$("html, body").animate({ scrollTop: $('#green').offset().top }, 1000);
}
else if($(this).scrollTop() > 1000) {
$("html, body").animate({ scrollTop: $('#yellow').offset().top }, 1000);
}
else{
$("html, body").animate({ scrollTop: $('#red').offset().top }, 1000);
}
});
I didn't have much experience in JS.
Thanks i advance :)

This was a fun problem to work on.
This solution places the divs into an array, and remembers the array index of the element that was last scrolled to. Once a scroll event is triggered it checks to see if the new scrollTop is above or below the current divs top offset and moves to the next or previous div in the array accordingly.
This solution allows you to have many divs. I tried to remove the flickering you get when you scroll to fast, but the only way to do that I believe would be to disable the scrollbars during animation.
http://jsfiddle.net/dUVmh/35/
$(function() {
var divs = [],
body = $('body, html'),
currentDiv = 0,
timeout;
$('div').each(function() {
divs.push($(this));
});
// we only need to capture the first scroll event triggered and then
// add another listener once we have done our animation
var scrollListen = function() {
$(window).one('scroll', function() {
doScroll($(this).scrollTop());
});
};
// Without the timeout, the scroll event would be triggered again too soon
var scrollEnd = function() {
clearTimeout(timeout);
timeout = setTimeout(function() {
scrollListen();
}, 10);
};
// checks if the scroll direction was up and down and animates
// the body scrollTop to the next or previous div
var doScroll = function(scrollTop) {
var direction = scrollTop - divs[currentDiv].offset().top;
if (direction > 0 && currentDiv + 1 < divs.length) {
nextDiv = currentDiv + 1;
} else if (currentDiv - 1 > -1) {
nextDiv = currentDiv - 1;
}
if (currentDiv === nextDiv) {
scrollEnd();
}
body.animate({
scrollTop: divs[nextDiv].offset().top
}, 1000, function() {
currentDiv = nextDiv;
scrollEnd();
});
};
scrollListen();
});
Edit: Firefox scrollTop required to be changed on html and not body. Also fixed a problem with firefox calling scrollListen more than once at a time.

The problem is that the $(window).scroll(function()) gets called over and over again when scrolling through the ScrollTop animation with jQuery.
Here is a possible solution that checks if it is currently scrolling or not and only executes the ScrollTop animation once.
http://jsfiddle.net/dUVmh/29/
Side note: It might be a good idea to check which direction the user is scrolling (up or down) and depending on that scroll to the next div to the top or to the down.
You can check that be saving the last scrollTop position and comparing it with the current one.
UPDATE: Here's a solution that takes the scroll direction into account: http://jsfiddle.net/dUVmh/36/