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Absolute positioning on two overlapping html images while STILL being able to click?

So, I have two images I want to position over each other. Back image goes in the back, center image goes on top of it, and a random link (in this case google.com) goes on top of a specific drawn blue box on the center image.
I want to use absolute positioning so that the random link stays on the exact same part of the image. The reason the center image is separated from the back image is that later I want to do parallax scrolling where the background scrolls slower than the foreground. Also I'm going to add one more layer even further back later when I do the parallax thing, but for right now I'm just doing two.
This is the code that I have:
<div style="position: relative; pointer-events: none">
<img src="/static/CenterImage.png" style="width: 100%; height: auto; z-index:5; position: absolute; pointer-events: none;">
<img src="/static/BackImage.png" style="width: 100%; height: auto; position:absolute; z-index:4; pointer-events: none; ">
</div>
I for the life of me, cannot click that bottom link. When I delete position:absolute in the top image, suddenly I can no longer see the back image, but I can now perfectly click the link on the blue box.
How do I do this :(

you can put
pointer-events: none;
to styles of your elements/images that you don't want to be clickable and block the proper link

image floating out of parent div for no reason

The title may be a little bit unclear, but I have an <img> tag generated by the WordPress shortcode: the_post_thumbnail('thumbnail'); and I placed this inside a parent div, to give it the right place in the website.
single.php has this inside:
<div class="newsidebar">
<?php the_post_thumbnail('thumbnail'); ?>
</div>
HTML output:
css styling for .newsidebar
.newsidebar {
width: 30%;
position: relative;
left: 100%;
transform: translateX(-100%);
height: 500px;
margin: 4em 0;
}
expected output is just this image sitting inside my .newsidebar div, but actually it's stuck at the bottom of the page for no reason. There is no padding/margin pushing the img down, no position absolute with top/bottom styling.
Is there another css reason that I overlook why it wishes to sit ~1000px lower in the site then expected?
actual output on site:
What did I try to fix this?
giving the img:
positions,
margin,
top,
bottom,
but the only thing that actually got it to stay inside the parent was
.newsidebar > img {
position: absolute;
top:0;
left:0;
}
downside of this code, I don't want to use position absolute, as there are widgets/ other elements being added inside newsidebar. which will then hover above or below this image.
any CSS/JavaScript/jQuery solutions are helpful.
edit I fixed my issue using another WordPress function named get_the_post_thumbnail_url() and adding that url to the background of a div inside my .newsidebar div. but I am still curious to find out why this <img> was taking a trip down my website.

Solution for image gallery

Ok, to start off, I'm sure out in the internet there is a good tutorial about this, but I can't even manage to "write down" a possible title for the problem, and I apologise for that.
I like a responsive and simple makeup:
<div class="gallery-container">
<img src="/your/image/url.jpg">
<img src="/your/image/url2.jpg">
<img src="/your/image/url3.jpg">
......
</div>
My problem is: I have different aspect ratio images to show off all with the 3:2 aspect ratio.
An easy solution would be to insert the images as a background to the a element with CSS, set it to be centred contained and then, with a simple JS script define a height to be 75% of the a width.
I used this solution before, but this time is not working for me: I need to dynamically insert the images with PHP.
How can I get a similar effect to the above explained CSS technique but with the images declared in the HTML?
UPDATE: something like this: http://jsfiddle.net/fF6GL/ - but I need the above makeup, this one would not work in that case
P.S. if possible, I would like a solution without using a JS library.

If you can put those linked images into a list, this might work:
http://www.sitepoint.com/maintain-image-aspect-ratios-responsive-web-design/

Ok I got a solution that is working for me, a demo is available here: http://jsfiddle.net/fF6GL/3/
Essentially, I'm just adding the background image on the CSS directly on the HTML:
<div>
</div>
And this is the CSS:
div {
width: 90%;
margin: 0 auto;
}
div a {
display: block;
float: left;
width: 50%;
position: relative;
background-position: center center;
background-repeat: no-repeat;
background-size: cover;
}
For the height, I'm using a small clever trick here:
div a:before {
content: "";
padding-top: 75%;
display: block;
}
This won't work on IE, but sincerely, I don't care.

Single window application with 100% height and no scrollbars

I am currently developing a web application using jQuery.
The layout for the same goes as shown in the figure given below:
The orange color box at the very back should be 100% in height and width with some margin like 5px or so.
The logo and the tab-bar are placed as shown and are about 50px in height. But tab-bar should take size as shown with some margin.
The tab content should occupy the remaining height and should scroll for the contents it occupies.
Similar structure is required for the internal menubar and tab content.
Can anyone please suggest the layout method to employ?
Or how can I manipulate different heights/widths?
The requirement also suggests a responsive window i.e. the width/height to manipulate on resize.

The jsFiddle I said I'd make.
As you'll see, I make use of jQueryUI for the "tabs" layout and simply "add" a few things. The few things I "Add" are simple and the jQueryUI alreqady provides a strong CSS with which to manipulate to get desired result. Also attached to that page is a theme-switcher, so you could see what it would look like using different jQueryUI Default Themes.
I'll try to explain the process as shortly as possible without being to vague.
HTML
I first start with a basic page wrapper. Not too necessary, but it provides a nice "element" with which to work inside of and possibly make manipulations for page layout change in otherways in the future. For now it simply holds our page "padding" of 5px. The HTML and BODY tags will be set to a default and should not be manipulated beyond that as height and other properties begin to take different meanings for these tags in different browsers.
I then place 2 divs inside this wrapper, again, these could be done without depending on your needs. I like these 2 divs and use this alot because it provides "vertical align -> middle" as one might expect. The first, parent, is a div with class table. This will have its display set to table to provide a "table-like" layout but still have the ability to do things like "round the corners" or, as in my case, set height! The second, child, is the same except it will have a class and style as table-cell, respectively. This allows us to set something like vertical-align: middle; and ensure that this element is in the vertical middle of the page/table element. Again, with your layout, this may seem unneccessary, but I don't know your full expected end result and I'm trying to give as much "fluid dynamics" to the page as possible.
Finally, I first insert the jQueryUI tabs HTML in their expected layout, with 2 small differences. I place our "logo" in a custom span tag just before the ul. I also take the ui-tab-panel(s) and place them in their own container. This helps us adjust the height of our tabs area as needed. I also gave this container overflow, so even tho overflow maybe hidden on the body, it's still available for the tabs. (see also: small blog i wrote on jQueryUI Tabs)
<div class="page-wrapper">
<div class="table">
<div class="table-cell">
<div id="tabs">
<span class="my-logo">
<img src="http://www.w3.org/html/logo/downloads/HTML5_Logo_512.png" alt="logo here" />
</span>
<ul>
<li>Nunc tincidunt</li>
<li>Proin dolor</li>
<li>Aenean lacinia</li>
</ul>
<div class="ui-tabs-panel-container">
<div id="tabs-1">
<<p> ... </p>
</div>
<div id="tabs-2">
<p> ... </p>
</div>
<div id="tabs-3">
<p> ... </p>
</div>
</div>
</div>
</div>
</div>
</div>
CSS
As I mentioned before, jQueryUI provides us with a strong CSS to work with already. As you might have noticed, I made use of some of this by using their predefined class names throughout the HTML. This established things like background, color, and even font-family and more! Now that that is over with, let's layout our page mechanics first. As I mentioned, I give a very "direct" set of properties to HTML and BODY. This will help eliminate "Cross-browser-issues". I also provided a background color, tho you could set that at one of the children levels. This was done just to show you where HTML, BODY exist.
I then set our "frame" elements. .page-wrapper will provide our page wrapping, sizing will come from within, so there is no need to deal with it here. The .table and .table-cell provide display exactly as their name suggest. As previously mentioned, this provides a nice ability to maintain an element in the exact "center" of something, even vertically!
Now we manipulate our tabs and content. I use #tabs throughout to maintain "name-spacing". This will not only help with any "css overrides" on jQueryUI presets, but also helps keep page layout confusions to a minimum. This is always a good thing.
The first thing I manipulate is the placement and setting of our custom span for the logo. Then, of course, I have to change the ul to next to it. Thus I look at the CSS for the uls class. If I open edit tools in a browser, I can see the ul is given the classname ui-tabs-nav and I can see it has a margin setting. If I play with the margin-left of this ul I can see that nothing is affected but the left side of the ul. PERFECT! Here is what I must manipulate to set our log in its "own space".
Finally, I simply set our tabs container (given custom class name, ui-tabs-panel-container, made to match jQueryUI) to have overflow, so that if any content exceeds our page height, it can still be scrolled within this element.
html, body {
background-color: #ADDFFF;
height: 100%;
padding: 0;
margin: 0;
overflow: hidden;
width: 100%;
}
.page-wrapper {
padding: 5px;
}
.table { display: table; }
.table-cell { display: table-cell; vertical-align: middle; }
#tabs .my-logo {
display: inline-block;
float: left;
height: 2em;
margin: .5em 0 0;
padding: 0;
width: 2em;
}
#tabs .my-logo img {
max-height: 100%;
max-width: 100%;
float: left;
}
#tabs .ui-tabs-nav {
margin-left: 2em;
}
#tabs .ui-tabs-panel-container {
overflow: auto;
}
JS
Finally, the easy work. I write a function to set the height of our tabs content area, since it will be "filling" the rest of the page. This take a little thought, but not hard to figure out. With the function written, I simply add it to the window resize event and call that event right after. This way it's resized on load, thus giving us our "end height" for first view. I also establish the tabs, although not much work there since I'm just making "default tabs". Feel free to experiment, go wild!
// the following will resize our tabs content area and account for all the spacing neccessary
function setContentHeight(e) { return $(window).innerHeight() - $(this).offset().top - 10; } // -10 to account for padding
$(function() { // our on page load call
$("#tabs").tabs(); // establish tabs
// add ability to resize tabs content area on window resize, then call resize event
$(window).resize(function(e) { $("#tabs .ui-tabs-panel-container").height(setContentHeight) }).resize();
})
As for the layout of tab content, it's all up to you and your imagination. Hopefully this will give you a good idea of where to get started though! Good luck!

You could use something like Blueprint CSS:
http://www.blueprintcss.org/
Here's a very quick and dirty layout (not using blueprint CSS, just plain CSS), as a general guideline. It still needs work, but it could be used as a starting point:
<html>
<head>
<style>
html, body {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
overflow: hidden; /* hide page scrollbars */
}
div {
margin: 0 auto;
padding: 0;
border: 1px solid black; /* for debugging */
text-align: center;
}
#header {
width: 100%;
position: relative;
overflow: auto;
}
#header > div {
height: 5%;
float: left;
}
#logo {
width: 23%;
}
#spacer {
width: 1%; /* -1% for borders */
}
#tabbar {
width: 75%;
}
#tabContent {
}
#tabContent > div {
width: 100%;
}
#tabContentMenuBar {
height: 5%;
}
#tabContentMain {
min-height: 80%;
}
</style>
</head>
<body>
<div id="header">
<div id="logo">Logo</div>
<div id="spacer"></div>
<div id="tabbar" class="fullWidth">Tab bar</div>
</div>
<div id="tabContent">
Tab content
<div id="tabContentMenuBar">Tab content - menu bar</div>
<div id="tabContentMain">Tab content - main content</div>
</div>
</body>
</html>

Highlight a section of an image in JavaScript

I run a small webpage that allows users to click on various links using image maps. I'd like to highlight the section that a user clicks on to give some feedback to the user (they may be clicking on several different parts rapidly).
Is there a way I can invert (or otherwise highlight) a small section of an image JavaScript?

Instead of using image maps, you could try this CSS method:
Use a transparent <div> on top of each "image-map" part (link), and then use the CSS :hover pseudo-class to handle the highlighting.
CSS:
#image {
position: relative;
width: 400px;
height: 100px;
background-image: url(image_map.png);
}
#map-part {
position: absolute;
top: 10px;
left: 10px;
width: 50px;
height: 50px;
background-color: transparent;
}
#map-part:hover {
background-color: yellow; /* Yellow Highlight On Hover */
opacity: 0.2;
filter: alpha(opacity=20);
}
HTML:
<div id="image">
<a id="map-part" href="http://www.example.com/"></a>
</div>
Note that this will only work for rectangular links.

Take a look at jQuery MapHilight.
I'm not sure it does exactly what you need, but you can achieve that with minor tweaking.

How about overlaying a semi-transparent <DIV> block over the clicked area to highlight it?

There are many way,
In a d fashion way, break down your images into many smaller pieces and using table to combine them. After that, by using javascript to replace thr "src" attribute for the highlight effect.
In another CSS way, use CSS to clip the alt. image on top of the original, and control which area should be visible.
It is better to have a single image for all rather then many small images to speed up and user will get it without delay by network.