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Jquery - Animate by scroll positions to work the same on window resize

Hey I have this really annoying issue thats probably got a simple solution but for the life of me i cant find away to fix it.
Basically i have two images both 50% with of it's container now the goal is the both images to slide in (left/right) on the basis of the scroll position and once it get to the top of the container both images will sit is place.
Now i got that working to that point the only issue is when i resize the page the position of both images are wrong. I obviously did a resize() function with the same logic as the scroll() function but still i got nowhere. Here's my code
var page_width = $(document).outerWidth(),
page_height = $(document).outerHeight(),
left_image = $('.split-screen.youth'),
right_image = $('.split-screen.elite'),
offset = (page_width) / page_height;
left_image.css({'left':'0px'});
right_image.css({'right':'0px'});
$(window).on('scroll', null, function(){
var scrollTop = $(window).scrollTop(),
calc = -(scrollTop*offset);
left_image.css({
'margin-left': 'calc(100% + '+calc+'px)'
});
right_image.css({
'margin-right': 'calc(100% + '+calc+'px)'
});
});
$(window).resize(function(){
// something ???
});
Here is a jsFiddle of the issue although it doesn't look entirely accurate but you get the picture. When you resize the scroll position changes and i need the margin-left/margin-right values to be correct.

I think your problem is that you're still using the old offset value. Just update your global values first, than it works for me (see: https://jsfiddle.net/a7tfmp37/2/):
$(window).resize(function(){
page_width = $(document).outerWidth(),
page_height = $(document).outerHeight(),
offset = (page_width) / page_height;
var scrollTop = $(window).scrollTop(),
calc = -(scrollTop*offset);
left_image.css({
'margin-left': 'calc(100% + '+calc+'px)'
});
right_image.css({
'margin-right': 'calc(100% + '+calc+'px)'
});
});

Javascript DIV Movement on scroll

NIm creating an animation that moves a div incrementally on scroll. I'm close but I don't think my code is the most efficient and I don't know how to adapt it to add more arguments. So for instance, hitting a certain height on the page will then move the object right and stop moving it down. Below is my JS and the codepen can be found at;
http://codepen.io/anon/pen/KxHwu - Original
http://codepen.io/anon/pen/DLxqg - Messing about with moving right
var lastScrollTop = 0;
var boxPosition = $('#box').position();
var row2Position = $('#row2').position();
var distance = $('#row2').offset().top,
$window = $(window);
console.log(distance);
$window.scroll(function() {
if ( $window.scrollTop() >= distance - 400 ) {
var st = $(window).scrollTop();
console.log(st);
$('#box').css({top: 0 + st});
//CODE NOT WORKING
if(st >= 270) {
var boxPos = $('#box').position();
console.log(boxPos.left);
$('#box').css({left: boxPos.left + st});
}
//
lastScrollTop = st;
}
});
I'm looking for the box to start scrolling like it does, then when it hits half of row 2 scroll right.
I hope I have explained this in an easy way!
Thanks

http://codepen.io/anon/pen/tHwlq
Here is an example of how to do it; you'll need to tweak the numbers to make it work as you plan.
var $window = $(window);
var $box = $("#box");
$window.scroll(function() {
var scrollTop = $window.scrollTop();
if (scrollTop >= 250 && scrollTop < 400) {
$box.css({top: -250 + scrollTop});
} else if(scrollTop >= 400 && scrollTop < 600) {
$box.css({left: (50+(scrollTop-400)/2)+"%"})
}
});
If your project has numerous elements like this, I'd recommend the ScrollMagic (http://janpaepke.github.io/ScrollMagic/) library.
As far as efficiency is concerned I'd recommend the following:
1) Cache the jQuery selectors (note $box variable). Otherwise, jQuery will have to query the DOM on every scroll event.
2) Cache scrollTop rather then querying it multiple times within the event callback.
3) Although left and top work, using the transform: translate() property is more efficient, especially on mobile devices. (https://developer.mozilla.org/en-US/docs/Web/CSS/transform). However, on most mobile devices, scroll events only fire at the completion of a scroll, not while a page is scrolling.

Get the position of the scrollbar using javascript

So I am trying to show a tooltip like box as I scroll my webpage and I would like it to follow the scrollbar along the right side of the page.
I looked around and found something to attempt to accomplish that as shown below:
function returnPercentHeight(){
var a = document.getElementById('rightPanel').scrollTop;
var b = document.getElementById('rightPanel').scrollHeight - document.getElementById('rightPanel').clientHeight;
return ((a/b) * 100);
}
I then append a % to the end and set the top margin of the tooltip to that returned value. This works pretty well (sort of) I have to adjust the return((a/b) * x) part (x) to make it follow the scrollbar based on the size of the browser window. Is there a better way to accomplish what I am trying to do? (NOTE: I can only use javascript, no JQuery please.)
EDIT:
Only the div given an ID of 'RightPanel' is scrolling, I am not using the scrollbar on the browser, but a scrollbar on an inner div.

There are three ways to do so:
First:
is to use the fixed position as following;
Position: Fixed;
Second:
With jQuery;
$(function(){
$(window).on('scroll', function() {
var scrollPOS = $(document).scrollTop();
$('.scroll').css({
top: scrollPOS
});
}).scroll();
});
Third:
Same as the previous, only animated;
$(window).on('scroll', function() {
$("#div").stop().animate({
"marginTop": ($(window).scrollTop()) + "px",
"marginLeft":($(window).scrollLeft()) + "px"}, "slow" );
});

Although IE doesn't support, this is the coolest I've seen:
// get
var x = window.scrollX,
y = window.scrollY;
// set
window.scrollTo(1, 2);

Make a navigation bar retain position when scrolled

I know this question has been asked before, but I'm pretty sure after checking them out, that none of the navigation bars where built like this one.
I'm basically having trouble making the navigation bar "seamlessly" switch to a fixed position at the top of the screen after scrolling past its original position, then back again.
I have included the code, and an example here: http://jsfiddle.net/r2a6U/
Here is the actual function which makes the div switch to fixed position mode:
var navPos = $('#navContainer').offset().top;
$(window).scroll(function(){
var fixIT = $(this).scrollTop() >= navPos;
var setPos = fixIT ? 'fixed' : 'relative' ;
var setTop = fixIT ? '0' : '600' ;
$('#navContainer').css({position: setPos});
$('#navContainer').css({'top': setTop});
});
Any help would be much appreciated.
Cheers

You can fix your issue to remove the styles instead of setting them to relative and 600px. I suggest you add/remove a class in JavaScript which will then apply the fixed CSS though. You will end up with much nicer and cleaner JavaScript.
Also make sure you center #navContainer properly when it's fixed.
jsFiddle
CSS
#navContainer.fixIT {
position:fixed;
top:0;
/* these will ensure it is centered so it doesn't jump to the side*/
left:0;
right:0;
text-align:center;
}
JS
var navPos = $('#navContainer').offset().top;
$(window).scroll(function(){
var fixIT = $(this).scrollTop() >= navPos;
if (fixIT)
$('#navContainer').addClass('fixIT');
else
$('#navContainer').removeClass('fixIT');
});

Fix it in here: jsFiddle
Only a small script update:
var navPos = $('#navContainer').offset().top;
$(window).scroll(function(){
var navContainer = $('#navContainer');
if( $(this).scrollTop() >= navPos ) {
// make it fixed to the top
$('#navContainer').css({ 'position': 'fixed', 'top': 0 });
} else {
// restore to orignal position
$('#navContainer').css({ 'position': 'relative', 'top': 600 });
}
});

Javascript - Make div follow page ( works but it pushes sidebar too?)

/-----------------------------------------------------------------------------------/
EDIT: I do NOT want to use fixed CSS positioning. It's at the bottom of the viewport
without scrolling, however I want it to follow when it gets to the top.
/-----------------------------------------------------------------------------------/
I'm making a Squeeze Page with a MASSIVE sidebar. It's got tons of testimonials and facts and pictures and stuff. However, I have a button near the top I want to follow the user down the page as they scroll. Shouldn't be too hard right?
I've got this script - which starts dragging the .followme when it hits the top of the page. However - it also pushed down all the divs beneath it. Can I tell it to target JUST .follow and no affect the divs below it?
<script type="text/javascript">
var documentHeight = 0;
var topPadding = 15;
$(function() {
var offset = $(".followme").offset();
documentHeight = $(document).height();
$(window).scroll(function() {
var sideBarHeight = $(".followme").height();
if ($(window).scrollTop() > offset.top) {
var newPosition = ($(window).scrollTop() - offset.top) + topPadding;
var maxPosition = documentHeight - (sideBarHeight + 100);
if (newPosition > maxPosition) {
newPosition = maxPosition;
}
$(".followme").stop().animate({
marginTop: newPosition
});
} else {
$(".followme").stop().animate({
marginTop: 0
});
};
});
});

You have an easier option which doesn't require any JS\jQuery at all.
.followme {
position: fixed;
height: 30px;
width: 30px;
background-color: #FF0000;
top: 48%;
left: 0;
}
This will never affect any of the other elements of the page and doesn't require any scripting at all. Now if you need the element (followme) to for example show at a certain scroll % or any other interactivity you might think of, then you will be needing to think more creatively. But if the problem is just to let the element follow your scrolling then the above should be a good and clean solution.
Example code:
http://jsfiddle.net/bhpgC/