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JQuery Offset issue when div position is fixed

I have a website which has a page layout and style something like mentioned in this JsFiddle
Now Using JQuery when I click on the button, content is being displayed properly as shown below:
But when I first scroll the page and then click the button, content is not displaying properly as shown:
Can you please guide me to handle this situation ?
I have used below jQuery for this. But it seems offset or position is not working
$('#btn').click(function(){
var t = $(this).offset();
console.log(t);
$('.control-container').css('top', t.top + 20 + 'px');
$('.control-container').css('display', 'block');
});
$(document).on('scroll', function(){
$('.control-container').css('display', 'none');
});

You don't need to use offset to achieve that... And if you need to keep CSS with position:fixed, you need to switch it in javascript to static.
The thing you are looking for is simply display:table ...
$('#btn').click(function(){
$('.control-container').css({'display': 'table','position': 'static'});
});
$(document).on('scroll', function(){
$('.control-container').css({'display': 'none','position': 'fixed'});
});
Check out this JSFiddle
But if you really need a solution with position:fixed based on button position, you should try this way:
$('#btn').click(function(){
var button_fixed_position = $('#btn').get(0).getBoundingClientRect();
$('.control-container').css({'display': 'block','left' : button_fixed_position.left, 'top' : button_fixed_position.bottom});
});
$(document).on('scroll', function(){
$('.control-container').css({'display': 'none'});
});
Check out second JSFiddle

There is no need to specifically mention position property here.
Also remove the closing a tag and replace it with </button>
Currently container is occupying full width ,but that can also be set
$('#btn').click(function() {
var t = $(this).offset();
console.log(t);
$('.control-container').css('top', t.top + 30 + 'px');
$('.control-container').css('display', 'block');
});
$(document).on('scroll', function() {
$('.control-container').css('display', 'none');
});
.header {
background-color: maroon;
color: #fafafa;
height: 60px;
position: fixed;
width: 100%;
text-align: center;
line-height: 19px;
font-size: 25px;
z-index: 2;
padding: 0px;
margin: 0px;
top: 0;
}
.content {
background-color: #fff;
border: 1px solid #999;
padding: 5px;
height: 100%;
width: 100%;
position: absolute;
z-index: 1;
top: 60px;
}
.control-container {
width: auto;
background-color: red;
#position: fixed;
color: #fff;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container">
<div class="header">
Header
</div>
<div style="clear:both">
</div>
<div class="content">
<br/>
<br/>
<br/>
<br/>
<br/>
<button id="btn">Click Me</button>
<div class="control-container" style="display:none;">
Keep me exactly underneath 'Click Me' when Page is scrolled.
</div>
</div>
</div>

CSS position fixed property positions an element referencing view's/body's dimension.
If you have access of modifying CSS, then just remove the position: fixed; property from .control-container.
If you don't have access, then using script add position: static !important property to .control-container.
$('.control-container').css('cssText', 'position: static !important');
Modified JSFiddle

Always focus mouse cursor in particular div in JQuery

I have a div "wtb_wrapper_middle" in middle of my web page.
For that div only scroll able in web page. In left and right div are not movable, it fixed in my web page.
So I want to mouse always focus on that particular div wherever my mouse clicked or mouse hover. Means when i use keyboard up or down button at that time that particular div only should be scroll.
Is there possible in JQuery.
My code is like below.
<div id="wtb_wrapper_inner">
<div id="wrapper_left">
....
....
....
</div>
<div id="wtb_wrapper_middle">
....
....
....
....
</div>
<div id="wtb_wrapper_right">
....
....
....
</div>
</div>
In from above html code "wtb_wrapper_middle" area only scrolls in my web page.
I have tried the below
window.onload = function() {
document.getElementById("wtb_wrapper_middle_inner").focus();
};
In this code is focus only on page load, but if clicked mouse in somewhere else, at that time also that middle area should be scroll. That is not working.
My Ajax callback function like below
$.ajax({
type: "POST",
url: "search.php?ajaxrequest=yes",
data: query_string
}).done(function( data ) {
$(".wtb_p_loader").remove();
$("#wtb_wm_listing").append(data);
});
I'm appending return success data into the di wtb_wm_listing which is i have placed inside of main div wtb_wrapper_middle
Anyone help me to make it success..

You can do this using css position: fixed;
The two outer divs are fixed to the screen regardless of scroll position. Then the central div scrolls regardless of where the mouse pointer is. You can use top and bottom to fix the full height of the screen, then left and right to fix each on either side.
You can still interact with content in the fixed outer divs.
And the Html is
<div class='left'>
<a href='#'>Hover to check the mouse focus and scorll</a>
</div>
<div class='center'>
//some long content
</div>
<div class='right'>
</div>
Css for doing this action.
a {
color: #000;
display: block;
font-family: arial;
margin: 10px;
text-decoration: none;
}
a:hover {
background-color: #f03055;
color: #fafafa;
}
p {
color: #fafafa;
font-family: arial;
line-height: 24px;
margin: 0 0 25px 0;
padding: 0 2%;
}
.center {
background-color: #97c;
height: 2000px;
margin: 0 25%;
width: 50%%;
}
.left {
background-color: #7c9;
bottom: 0;
left: 0;
position: fixed;
top: 0;
width: 25%;
}
.right {
background-color: #7c9;
bottom: 0;
position: fixed;
right: 0;
top: 0;
width: 25%;
}

EDIT: to filter out input elements
document.body.onkeydown = function(event){
var e = event || window.event,
target = e.target || e.srcElement;
if (target.tagName.toUpperCase() == 'INPUT') return;
document.getElementById("wtb_wrapper_middle_inner").focus();
};
this will move focus to your middle div whenever keydown event occurs.

Iframe | Mobile back button on youtube iframe

I have got a video that appears in a light box from you tube, a custom one not a plugin.
On mobile when displayed portrait the video spans the full page width which looks nice and leaves some room at the top and bottom to click out.
The issue is when I go landscape the video fills the full screen and you cannot get back onto the page. My initial reaction was to hit the phones back button but I don't know a way of getting this to simply remove my lightbox. Is there a way in JS of getting a onclick off the phones back button?
The reason it goes full screen is because I am keeping the aspect ratio
var width: number = $('.youtube-video-lightbox').outerWidth();
var height: number = (width / 16) * 9;
$('.youtube-video-lightbox').height(height);

You can try using the following code:
You need to listen to navigation event and state.direction.
$(window).on("navigate", function (event, data) {
var direction = data.state.direction;
if (direction == 'back') {
// close the light box here
}
if (direction == 'forward') {
// do something else
}
});
More details in this link
Tested the above code in my mobile and it works fine. You might need to stop the program flow after closing the light box so that default navigation of the back button is stopped.

Weave: http://kodeweave.sourceforge.net/editor/#e110ed7e89c3a38335739656a02f9850
Have you thought of trying a Pure CSS Based Lightbox?
$('[data-target]').on('click', function() {
$('.page').attr('src', $(this).attr('data-target'));
});
$('#call').on('change', function() {
(this.checked) ? "" : $('.page').attr('src', '');
});
input[id=call] {
display: none;
}
a {
margin: 1em;
}
.bg,
.content {
opacity: 0;
visibility: hidden;
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
transition: all ease-in 150ms;
}
.bg {
background: #515151;
background: rgba(0, 0, 0, 0.58);
}
.content {
margin: 2.6352em;
padding: 1em;
background: #fff;
}
input[id=call]:checked ~ .bg,
input[id=call]:checked ~ .content {
visibility: visible;
opacity: 1;
}
.block {
display: block;
}
.pointer {
cursor: pointer;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input id="call" type="checkbox" />
<p>
<a href="javascript:void(0)" data-target="http://bing.com/" class="pointer block">
<label for="call" class="pointer">Bing</label>
</a>
<a href="javascript:void(0)" data-target="http://duckduckgo.com/" class="pointer block">
<label for="call" class="pointer">DuckDuckGo</label>
</a>
</p>
<label for="call" class="bg pointer"></label>
<div class="content">
<iframe width="100%" height="100%" frameborder="0" class="page"></iframe>
</div>

Hide Container If Clicked on Background Not Working

I am trying to hide the popup if the background is clicked, but NOT the div.
Basically, when the user clicks the background it will hide the div; yet, if the user clicks the actual div it will still hide it. I would only like the div to be hidden on the clicking of the background.
Here is my code:
HTML
<div id="linkinputholder">
<div id="linkinputbox">
Title
</div>
</div>
<button onclick="displaylinkinput()" type="button"> Display </button>
CSS
#linkinputholder {
display: none;
position: fixed;
z-index: 100;
width: 100%;
min-height: 100%;
left: 0px;
top: 0px;
background: rgba(0, 0, 0, 0.2);
}
#linkinputbox {
display: block;
background-color: red;
width: 500px;
height: 100px;
position: fixed;
margin: auto;
left: 0;
right: 0;
top: 0;
bottom: 0;
}
JS/Jquery
function displaylinkinput() {
document.getElementById('linkinputholder').style.display = "block";
}
$('#linkinputholder').click(function() {
document.getElementById('linkinputholder').style.display = "none";
});

I'm assuming by background you mean your linkinputholder div, which is 100% wide by 100% tall. Your jquery code was missing the call to displaylinkinput, so i added a click event handler to call it. When you click on the linkinputbox div, the click event passes down through to linkinputholder. To prevent this just stop the event propagation.
$('#linkinputbox').click(function (evt) {
evt.stopPropagation();
});
I have created a JSFIDDLE for you here: http://jsfiddle.net/seadonk/oLgex1pq/
Here is the corrected javascript:
function displaylinkinput() {
$('#linkinputholder').show();
}
$(function () {
$('button').click(function () {
displaylinkinput();
});
$('#linkinputholder').click(function () {
$('#linkinputholder').hide();
});
$('#linkinputbox').click(function (evt) {
evt.stopPropagation();
});
})();

Edit
Check if div is target
$('#linkinputholder').click(function(event) {
if (jQuery(event.target).is('.linkinputholder')) return;
document.getElementById('linkinputholder').style.display = "none";
});

How to make images fade visible when i'm scrolling

<div id="smiley">
<div id="star">
<img src="inc/img/heks.png" class="star">
<img src="inc/img/impo.png" class="star">
<img src="inc/img/angst.png" class="star">
</div>
</div>
#smiley{
margin: 50px auto 80px;
width: 1132px;
height: 300px;
}
#smiley #star{
display: none;
float: left;
height: 300px;
width: 1132px;
}
#smiley #star img.star{
display: block;
float: left;
width: 300px;
margin: 50px 38px 0px;
}
I need have the images to fade visible when i'm scrolling down to them.
i hope you understand the question.
This website template, does it http://www.templatemonster.com/demo/51771.html

Demo .. Source code
If you want to show the images only when they become in the window of browser.. without affecting their loading ..
Try this, make the visibility of image hidden, then using JavaScript add class fadeIn to the image when it become in the window of browser ..
So .. in your CSS :
<style>
.star {
visibility: hidden;
}
.fadeIn {
-webkit-animation: animat_show 0.8s;
animation: animat_show 0.8s;
visibility: visible !important;
}
#-webkit-keyframes animat_show{
0%{opacity:0}
100%{opacity:1}
}
</style>
Then load jQuery library
<script src="//code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
and in your JavaScript:
<script>
function showImages(el) {
var windowHeight = jQuery( window ).height();
$(el).each(function(){
var thisPos = $(this).offset().top;
var topOfWindow = $(window).scrollTop();
if (topOfWindow + windowHeight - 200 > thisPos ) {
$(this).addClass("fadeIn");
}
});
}
// if the image in the window of browser when the page is loaded, show that image
$(document).ready(function(){
showImages('.star');
});
// if the image in the window of browser when scrolling the page, show that image
$(window).scroll(function() {
showImages('.star');
});
</script>
Hope this will help you ..