Develop Reference

Fixed Side Bar with appearing image

I've got my side bar working almost as I want it, but am having issues at certain page heights:
The side bar should work as follows:
When the "menu" hits the top of the page, an image appears about the menu and the entire side is fixed - working!
If the footer collides with the bottom of the sidebar when fixed, it starts to scroll up - working!
If the window height is smaller than the sidebar height, it never fixes - not quite working.
For point 3, there is an area of about 170 pixels between 581px and 751px (height) where the sidebar starts to jump around. In the example, if the browser height is ~580 or less then it works fine, but if it falls into that zone it starts to become jittery.
I've mimicked the behaviour here:
https://jsbin.com/wokupacebu/edit?html,css,js,console
doesn't quite fit the window sizes in jsbin, so to see a full screen working copy, see here:
https://output.jsbin.com/wokupacebu
here's my JS - the CSS and HTML can be found in the jsbin.
$(function() {
$sideBarContainer = $("#side-bar-container");
$sideBar = $("#side-bar");
$sideImageContainer = $("#side-image-container");
$sideImage = $("#side-image")
$footer = $("#footer");
$window = $(window);
$(window).on("scroll.sidebar resize.sidebar",function() {
setSideBarFixable();
});
function setSideBarFixable() {
if ($window.height() < $sideBar.height() + $sideImage.outerHeight()) {
$sideBar.removeClass("fixed");
$sideBarContainer.css("width","auto");
$sideImageContainer.css("height","0");
return;
} else {
if ($window.scrollTop() >= $sideBarContainer.position().top) {
$sideBar.addClass("fixed");
$sideBarContainer.css("width",$sideBar.outerWidth() + "px");
$sideImageContainer.css("height",$sideImage.outerHeight() + +"px");
} else {
$sideBar.removeClass("fixed");
$sideBarContainer.css("width","auto");
$sideImageContainer.css("height","0");
}
var diff = $footer.position().top - $window.scrollTop() - $sideBar.outerHeight();
if (diff <= 0) {
$sideBar.css("top",diff+"px");
} else {
$sideBar.css("top","0");
}
}
}

Scrolling Two Divs Using JQuery/Javascript

Wrapper - Overflow Hidden
Div One: Sidebar
Div Two: Main Content
Div Two will have a normal scroll. Div One I wish to have no visible scroll however when you scroll Div One it scrolls Div Two.
Upon Div One's height hitting the bottom, it will no longer scroll and visa-versa for scrolling back up.
This will result in the sidebar always being visible at the side. Before you ask, I've tried all positioning types to get this to work resulting in many failed attempts.
My live demo can be seen here: http://rafflebananza.com/admin/newadmin.html#
Note I've tried to make a JSFiddle simplified but my maths does not seem to work in there the same. Please suggest whether I should fork all my page to there or whatnot for future visitors needing the same help.
Overview
Scrolling in the wrapper will scroll sidebar to point x only (x being the sidebars height) then stopping but will continue to allow the content to be scrolled. Visa-versa for scrolling back up.
Somewhat half way there...
var scrollTop = (window.pageYOffset !== undefined) ? window.pageYOffset : (document.documentElement || document.body.parentNode || document.body).scrollTop,
position = document.body.scrollTop;
function scrollD() {
var scroll = document.body.scrollTop;
if (scroll > position) {
// Scrolling Down Functions
} else {
// Scrolling Up Functions
}
position = scroll;
}

Updated the answer to match OPs requirements.
I downloaded your website in its current state and made the following changes to your code:
var scrollY = 0;
$(window).scroll(function() {
var sideNav = $('.SideNav'); // The side navigation
var wScrollY = $(this).scrollTop(); // Current scroll position of Window
var navHeight = sideNav.height(); // Height of the Navigation
var StageHeight = $(window).height() - 46; // The display space
if(sideNav.height() > StageHeight) { // Do the following if the side navigation is higher than the display space
var spaceLeft = sideNav.height() - StageHeight; // spaceLeft -> how many pixel left before fixing navigation when scrolling
if(scrollY < wScrollY) { // Scroll direction is down
if (wScrollY >= spaceLeft) // If scroll top > space left -> fixate navigation at the bottom, otherwise scroll with the content
sideNav.css({top:46-spaceLeft+wScrollY});
if (wScrollY <= 46) // Set top strict to 46. Sometimes there is white space left, caused by the scroll event.
sideNav.css({top:46});
} else { // Scroll direction is up
var sideNavTop;
if (sideNav.offset().top < 0) {
sideNavTop = Math.pow(sideNav.offset().top); // if top is negative, make it positive for comparison
} else {
sideNavTop = sideNav.offset().top;
}
if (sideNavTop > (46+wScrollY)) // Fixate the header if top of navigation appears
sideNav.css({top:46+wScrollY});
}
} else {
sideNav.css({top:46+wScrollY}); // Fixate always
}
scrollY = wScrollY;
});
This will let you scroll your side navigation up until its end. Then fixate. If you scroll up, it will still be fixated until your reach the point, where the navigation must scrolled back to its original position.
You can check the edited version here: http://pastebin.com/Zkx4pSKe
Just copy the raw code into a blank html page and try it out.
It's a bit messy and maybe not the best solution, but it works.

Ok, here you go:
var $sidebar = $('.sidebar'),
$window = $(window),
previousScroll = 0;
$window.on('scroll', function (e) {
if ($window.scrollTop() - previousScroll > 0) {
$sidebar.css({
'top': Math.max($window.scrollTop() + $window.height() - $sidebar.outerHeight(true), parseInt($sidebar.css('top'))) + 'px'
});
} else {
$sidebar.css({
'top': Math.min($window.scrollTop(), parseInt($sidebar.css('top'))) + 'px'
});
}
previousScroll = $window.scrollTop();
});
http://jsfiddle.net/7nwzcpqk/1/

i might have misunderstood your desired result incorrectly but you can see if this works for you :
.SideNav {
position: fixed; // you currently have this as position:absolute;
}

You don't need nor a wrapper element nor jQuery. I assume that you are using a wrapper because you want to have the top bar placed there. I think there is a better way to do it by using simply three divs.
The top bar has to be fixed (to be always visible) and of full width.
The side bar also has to be fixed (to be always visible) with a top margin of the height of the top bar.
The content needs just a left padding (width of side bar) and top padding (height of top bar).
Here is the example code (http://jsfiddle.net/zckfwL4p/):
HTML
<div id="top_bar"></div>
<div id="side_bar">links here</div>
<div id="content"></div>
CSS
body {
margin:0px;
padding:0px;
}
#side_bar {
width:50px;
position: fixed;
left:0px;
top:20px;
background-color:blue;
}
#top_bar {
position:fixed;
height:20px;
left:0px;
right:0px;
background-color:red;
}
#content {
position:relative;
padding-left:55px;
padding-top:25px;
}

jQuery fixed sidebar that moves with content if overflow

I have the following fiddle: http://jsfiddle.net/yFjtt/1/
The idea is that the user can scroll PAST the header to make the sidebar 'stick' in place while they scroll further down the page.
As they near the bottom of the page it should then work out how much space is left and how much space the sidebar needs and the add some negative margin to move the sidebar upwards whilst maintaining the fixed position.
Upto here it all works fine.
The next problem is making sure that the sidebar only moves up as far as it needs to and should remain about 10 pixels from the bottom. This way the sidebar will be fixed until it needs to move upward to reveal its content and then once it's all shown become stuck again about 10 pixels from the bottom.
Here is where I have tried to achieve this (see fiddle for full code):
if( $(window).scrollTop() > (documentHeight - sidebarHeight) ) {
if( offsetBottom < 10) {
}
else {
$('div.sidebar').stop(true,false);
$('div.sidebar').animate({'margin-top':offset}, 300);
}
} else {
$('div.sidebar').stop(true,true);
$('div.sidebar').css({'margin-top':'0'});
}
However the sidebar STILL moves too far up the page... Can anyone help? I'm sure it's just a simple mistake working out the offset from the bottom.

I think you had a good try, except I'm not sure what those animations are doing there. Basically you need 3 checks, first to see if the use is above the header, second to check if they're between the header and the bottom most limit for the sidebar, and lastly if they're below that point. Then simply swap and change classes and modify top value as necessary.
jsFiddle
var sidebarHeight = $('div.sidebar').height();
var documentHeight = $(document).height();
var headerHeight = $('div.header').height();
$(window).scroll(function() {
var margin = 10;
var sidebar_offset = documentHeight - sidebarHeight - (margin * 2); // double margin to account for top and bottom margins
if ($(window).scrollTop() > headerHeight && $(window).scrollTop() < sidebar_offset ) {
// below header, but above the sidebar offset limit
$('div.sidebar').addClass('fixed');
$('div.sidebar').css('top', '');
}
else if ( $(window).scrollTop() <= headerHeight ) {
// above header
$('div.sidebar').removeClass('fixed');
$('div.sidebar').css('top', '');
}
else {
// past the sidebar offset limit
$('div.sidebar').removeClass('fixed');
$('div.sidebar').css('top', documentHeight - sidebarHeight - margin);
}
});​

script jQuery floating footer

I have a jQuery code which i am using to float a div when I scroll down
var top = jQuery('#sider').offset().top - parseFloat(jQuery('#sider').css('marginTop').replace(/auto/, 0));
jQuery(window).scroll(function (event) {
// what the y position of the scroll is
var y = jQuery(this).scrollTop();
// whether that's below the form
if (y >= top) {
// if so, ad the fixed class
jQuery('#sider').addClass('fixed');
} else {
// otherwise remove it
jQuery('#sider').removeClass('fixed');
}
});
But I have also a div which is at the bottom of body, and I want to show that div
what changes I need to made to this code.

something like this is acceptable?
http://jsfiddle.net/Cvgdz/1/
maybe you need to change the floatDiv height of my example..

How to stop floating div at specified point using jQuery

I am trying to stop a floating (sliding) div when it reaches the bottom of a containing div but it isn't working. The variable bottom is the lowest point on the page of the containing div but for some reason doesn't act as it should. Anyone have a better method?
$(document).ready(function () {
var top = $('#buttonsDiv').offset().top - parseFloat($('#buttonsDiv').css('margin-top').replace(/auto/, 0));
var bottom = $('#mainBody').offset().top + $('#mainBody').height();
$(window).scroll(function (event) {
// what the y position of the scroll is
var y = $(this).scrollTop();
var z = y + $('#buttonsDiv').height();
// whether that's below the form
if (y >= top && z <= bottom) {
// if so, add the fixed class
$('#buttonsDiv').addClass('fixed');
} else {
// otherwise remove it
$('#buttonsDiv').removeClass('fixed');
}
});
});

Try the below conditions:
if (y >= top && z <= bottom) {
// if so, add the fixed class
$('#buttonsDiv').addClass('fixed');
} else if(z > bottom) {
// otherwise remove it
$('#buttonsDiv').removeClass('fixed').addClass('absolute');
} else {
// otherwise remove it
$('#buttonsDiv').removeClass('fixed');
}
Once you scroll past the container DIV (#mainBody), the floating DIV (#buttonsDiv) should be positioned 'absolute' to the bottom of the container DIV.

Simply defining a margin-bottom with floating div or padding-bottom with external div in this case should help. I have used a similar thing in the following website: www.emotionstorm.com to stop the shopping cart below the top banner.
Please let me know if you need help for a similar code.