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Dropdown Menu appears fine in Chrome but not in Safari (covered by image)

The Nav dropdown menu works fine in Chrome, but in Safari the rest of the menu is covered by the image.
Why is this happening only in Safari? It displays just fine in Chrome.
Things I have attempted to no avail :
meddled with Z-index
tried using position:relative for the dropdown menu
added on -webkit-transform
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t=u(e)?e+"":e}if(typeof t!="string")return 0===t?t:+t;t=t.replace(g,"");var n=v.test(t);return n||O.test(t)?h(t.slice(2),n?2:8):j.test(t)?s:+t}var l,p="4.17.5",b="Expected a function",s=NaN,y="[object Null]",m="[object Symbol]",d="[object Undefined]",g=/^\s+|\s+$/g,j=/^[-+]0x[0-9a-f]+$/i,v=/^0b[01]+$/i,O=/^0o[0-7]+$/i,h=parseInt,x=typeof global=="object"&&global&&global.Object===Object&&global,T=typeof self=="object"&&self&&self.Object===Object&&self,w=x||T||Function("return this")(),S=typeof exports=="object"&&exports&&!exports.nodeType&&exports,N=S&&typeof module=="object"&&module&&!module.nodeType&&module,E=Object.prototype,$=E.hasOwnProperty,_=E.toString,W=w.Symbol,I=W?W.toStringTag:l,M=Math.max,k=Math.min,D=function(){
return w.Date.now()};t.debounce=o,t.throttle=i,t.isObject=u,t.isObjectLike=f,t.isSymbol=c,t.now=D,t.toNumber=a,t.VERSION=p,typeof define=="function"&&typeof define.amd=="object"&&define.amd?(w._=t, define(function(){return t})):N?((N.exports=t)._=t,S._=t):w._=t}).call(this);
// This function will run a throttled script every 300 ms
var checkHeader = _.throttle(() => {
console.log('checkHeader');
// Detect scroll position
let scrollPosition = Math.round(window.scrollY);
// If we've scrolled 130px, add "sticky" class to the header
if (scrollPosition > 130){
document.querySelector('header').classList.add('sticky');
}
// If not, remove "sticky" class from header
else {
document.querySelector('header').classList.remove('sticky');
}
}, 300);
// Run the checkHeader function every time you scroll
window.addEventListener('scroll', checkHeader);
header{
padding: 0px;
overflow: hidden;
position: fixed;
top: 0px;
width: 100%;
height: 120px;
background-image: linear-gradient(to right, rgba(9, 9, 22, 0.6), rgba(9, 9, 22, 1.0));
}
main{
margin-top: 120px;
}
header.sticky {
background-color: black;
height: 90px;
}
header.sticky nav{
top: 30px;
}
header.sticky #logo{
font-size: 3em;
padding: 10px 0px 10px 10px;
}
header #logo{
font-size: 5em;
float: left;
}
.phi{
color: rgb(141, 180, 105);
}
.hilo{
color: white;
}
nav{
float: right;
position: fixed;
top: 50px;
left: 280px;
}
nav > a, .dropmenu{
padding-left: 0.5em;
padding-right: 0.5em;
}
nav a, .dropdown{
color: rgb(240, 137, 52);
font-size: 20px;
}
a{
text-decoration: none;
}
.dropdown {
position: relative;
display: inline-block;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #ddd;
min-width: 100%;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
border-radius: 21px 21px 21px 21px;
z-index: 1;
}
.dropdown-content a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}
.dropdown-content a:hover {
background-color: rgb(247, 185, 71);
border-radius: 21px 21px 21px 21px;
}
.dropdown:hover .dropdown-content {display: block;}
.dropmenu:hover {
cursor: pointer;
}
.universe {
background-image: url("../assets/img/universe.jpg");
background-size: cover;
background-repeat: no-repeat;
background-position: center;
padding: 0px;
width: 100%;
height: 25em;
display: inline-block;
z-index: -999;
}
blockquote{
color: white;
font-size: 4em;
text-align: center;
margin: 2em auto;
}
.bgbutton, .bottominfo{
background-color: white;
}
.button{
display: inline-block;
border-radius: 4px;
background-color: rgb(240, 137, 52);
border: none;
color: #FFFFFF;
text-align: center;
font-size: 40px;
padding: 20px;
transition: all 0.5s ease;
cursor: pointer;
margin: 50px 180px;
}
.button span{
cursor: pointer;
display: inline-block;
position: relative;
transition: 0.5s ease;
}
.button span:after{
content: '\00bb';
position: absolute;
opacity: 0;
top: 0;
right: -20px;
transition: 0.5s ease;
}
.button:hover span{
padding-right: 25px;
}
.button:hover span:after{
opacity: 1;
right: 0;
}
<div class="wrapper">
<header>
<a href="index.html">
<div id="logo">
<span class="phi">&#934</span><span class="hilo">hilo</span>
</div>
</a>
<nav>
HOME
<div class="dropdown">
<a class="dropmenu">INTERIOR DESIGN</a>
<div class="dropdown-content">
OUR PHILOSOPHY
OUR INNOVATION
TESTIMONIALS
</div>
</div>
FENG SHUI
<div class="dropdown">
<a class="dropmenu">SERVICES</a>
<div class="dropdown-content">
SPACE PLANNING
FENG SHUI CONSULTATION
DESIGN & CARPENTRY
</div>
</div>
<div class="dropdown">
<a class="dropmenu">OUR MASTERPIECE</a>
<div class="dropdown-content">
RESIDENTIAL
RETAIL
CORPORATE & OFFICE
</div>
</div>
<div class="dropdown">
<a class="dropmenu">ABOUT</a>
<div class="dropdown-content">
CHIEF DESIGNER
MASTER PEK
OUR SUBSIDIARIES
FAQ
</div>
</div>
BLOG
</nav>
</header>
<main>
<div class="universe">
<section>
<blockquote>Where Feng Shui Meets Design</blockquote>
</section>
</div>

I have finally found the problem and came to a solution.
The problem was hidden at the header section.
After changing header - overflow: visible (from hidden), the dropdown menu in navbar is displaying properly now in Safari.
The reason Safari renders this so differently from Chrome is unfathomable.

Transparent/Opaque Navigation Bar is Behind "div" with Class "transbox"

I started off with some text over a background image for the home page on my website. I wanted to make the letters more legible so I added an opaque box using the class "transbox" and setting it's opacity. I'm not too concerned about the text being transparent, but now the navigation bar that I have set up sits behind the "transbox" and will not let me click the links when I scroll over the "transbox" since it is sitting over the navigation bar.
I have already tried setting the z-index appropriately and even went through changing the classes and css code to make it simply a transparent container with some text, however the problem persists and new issues arise regarding container/text placement.
All I want is the navbar to be over everything so it is not covered and unusable in any situation as the user scrolls through the page. I'm curious if this is a bug with opacity, if I am using the wrong type of class, or if it is something entirely different.
$(window).on('scroll', function(){
if($(window).scrollTop()){
$('nav').addClass('black');
$('header').addClass('black');
$('header .logo img').addClass('black');
$('header ul').addClass('black');
$('header a').addClass('black');
}
else
{
$('nav').removeClass('black');
$('header').removeClass('black');
$('header .logo img').removeClass('black');
$('header ul').removeClass('black');
$('header a').removeClass('black');
}
})
header{
background: #35424a;
color: #ffffff;
z-index: 999;
}
header.black{
z-index: 999;
}
header a{
color: #5ff5a3;
text-decoration: none;
text-shadow:
-1px -1px 0 #000,
1px -1px 0 #000,
-1px 1px 0 #000,
1px 1px 0 #000;
text-transform: uppercase;
padding: 5px 20px;
font-size: 16px;
transition: .5s;
}
header a.black{
color: #ffffff;
font-size: 14px;
}
header ul{
float: right;
padding: 68px 50px 0 10px;
display: flex;
transition: .5s;
}
header ul.black{
padding: 40px 10px 0 10px;
}
header li{
float: left;
display: inline-block;
box-sizing: border-box;
padding: 1px;
transition: .5s;
}
header nav{
position: fixed;
top: 0;
left: 0;
width: 100%;
transition: .5s;
}
header nav.black{
background: rgba(0,0,0,.8);
color: #000000;
}
header .current a, header a:hover{
color: #ffffff;
background: #000000;
font-weight: bold;
border: 1px solid #ffffff;
transition: .5s;
}
header .logo img
{
width: 500px;
padding: 0px 50px;
height: auto;
float: left;
transition: .5s;
}
header .logo img.black
{
width: 300px;
padding: 0px 20px;
}
#showcase{
min-height: 1000px;
background: url(../img/showcaseimg.jpg) no-repeat 0 -200px;
background-size: cover;
background-position: center;
text-align: center;
color: #ffffff;
}
#showcase h1{
font-size: 55px;
color: #ffffff;
padding: 0px 20px;
}
#showcase p{
font-size: 20px;
color: #ffffff;
padding: 0px 20px 20px;
}
#showcase .transbox{
margin-top: 700px;
margin-bottom: 10px;
background-color: #000000;
opacity: 0.6;
z-index: 1;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<header>
<div class="container">
<nav>
<div class="logo">
<img src="./img/creativecs_logo.png">
</div>
<ul>
<li class="current">HOME</li>
<li>SERVICES</li>
<li>PRODUCTS</li>
<li>ABOUT</li>
<li>CONTACT</li>
<li>NEWS</li>
</ul>
</nav>
</div>
</header>
<section id="showcase">
<div class="container">
<div class="transbox">
<h1>Custom PC solutions for anyone and everyone.</h1>
<p>Designed by engineers. Tested by enthusiasts. Check out what CreativeCS has to offer you.</p>
</div>
</div>
</section>

It work fine for me.
That being said, for z-index to work you need your elements with z-index to be positionned (MDN).
header {
position:relative;
z-index: 999;}
#showcase {
position:relative;
z-index: 1;
}
You might need to read about the stacking context.
Here header and #showcase exist in the stacking context of the root element (html) so it will work fine. Other times you might want to create a stacking context that is not as high as the root element.

Everything seams to be fine, anchors do fire as expected, you can add this script to see wich element is selected..
var x = document.getElementsByTagName("*")
for(var i = 0; i< x.length; i++){
x[i].addEventListener("click", function(e){
alert(e.target.tagName)
})
}

javascript not working on my webpage

I doing a tshirt designing website for my college project.I have added preview option where when the user types it get displayed on the tshirt present in the iframe..I have also added a proceed button, when the user clicks on it,I want the text to get stored in database but for some reason I cant get it to work.I am using ajax and php for the database part.But the javascript part with ajax is not working.Even alert function is not working for onclick funtction..
Any help is appreciated..
$(document).ready(function)() {
$("#btn").click( function() {
var tshirt-text =$('#tshirt-text').val();
var size =$('#size').val();
alert("tshirt-text");
$.ajax ({
type :'POST',
data :{tshirt-text:tshirt-text,size:size},
url :"storeinfo.inc.php",
success :function(result)
})
});
});
var $text = $( '.tshirt-text' );
var $demoText = $( '.demo-tshirt-text' );
$text.on( 'keyup', function ( e ) {
$demoText.text( $text.val() );
} );
body{
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
margin-left: 0px;
padding: 0px;
overflow-x: hidden;
font-family: sans-serif;
}
header{
padding: 8px;
height:155px;
color: white;
background-color:#6495ED;
clear: left;
width:100%;
}
footer
{ padding: 4px;
color: white;
background-color:#6495ED;
width:100%;
text-align:center;
font-size:20px;
font-family:Arial;
}
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: #333;
width:100%;
}
li {
float: left;
}
li a,.dropbtn {
display: block;
color: white;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-family: Arial;
font-size: 20px;
}
li a:hover:not(.active), .dropdown:hover .dropbtn {
background-color: #111;
}
li a.active {
background-color: royalblue;
}
li.dropdown {
display: inline-block;
}
.dropdown-content {
display: none;
position: absolute;
background-color: royalblue;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
z-index: 1;
}
.dropdown-content a {
color: white;
padding: 12px 16px;
text-decoration: none;
display: block;
text-align: left;
}
.dropdown-content a:hover {background-color: #f1f1f1}
.dropdown:hover .dropdown-content {
display: block;
}
h2.tagline
{
text-align:center;
font-size:35px;
font-style:italic;
font-family: "Florence", cursive;
margin-top:-100px;
margin-left:-80px;
}
iframe {
width: 700px;
height: 700px;
margin: -590px 90px 20px 650px;
display: inline-block;
position: relative;
border:none;
}
.designcontainer {
display: inline-block;
margin:0 0 0 10px;
}
.colorbutton {
background-color: #4CAF50; /* Green */
border: none;
color: black;
padding: 15px 30px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 20px;
margin: 4px 2px;
cursor: pointer;
border-radius: 14px;
transition-duration: 0.4s;
box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
}
.colorbutton:active {
background-color: #3e8e41;
box-shadow: 0 5px #666;
transform: translateY(4px);
}
.buttonw {background-color: white; color:black;} /* White */
.buttonb {background-color: blue; color:white;} /* Blue */
.buttonr {background-color: #f44336; color:white;} /* Red */
.buttony {background-color: yellow; } /* Yellow */
#keyframes click-wave {
0% {
height: 40px;
width: 40px;
opacity: 0.35;
position: relative;
}
100% {
height: 200px;
width: 200px;
margin-left: -80px;
margin-top: -80px;
opacity: 0;
}
}
.option-input {
-webkit-appearance: none;
-moz-appearance: none;
-ms-appearance: none;
-o-appearance: none;
appearance: none;
position: relative;
top: 5.33333px;
right: 0;
bottom:0;
left: 0;
height: 25px;
width: 25px;
transition: all 0.15s ease-out 0s;
background: #cbd1d8;
border: none;
color: #fff;
cursor: pointer;
display: inline-block;
margin-right: 0.5rem;
outline: none;
position: relative;
z-index: 1000;
line-height: 50px;
}
.option-input:hover {
background: #9faab7;
}
.option-input:checked {
background: royalblue;
}
.option-input:checked::before {
height: 15px;
width: 15px;
position: absolute;
content: '\2714';
display: inline-block;
font-size: 26.66667px;
text-align: center;
line-height: 28px;
}
.option-input:checked::after {
-webkit-animation: click-wave 0.65s;
-moz-animation: click-wave 0.65s;
animation: click-wave 0.65s;
background: royalblue;
content: '';
display: block;
position: relative;
z-index: 100;
}
.option-input.radio {
border-radius: 50%;
}
.option-input.radio::after {
border-radius: 50%;
}
.labelname
{
font-size: 20px;
}
span {
position: relative;
display: inline-block;
margin: 30px 10px;
}
.gate {
display: inline-block;
width: 500px;
height: 100px;
padding: 10px 0 10px 15px;
font-family: "Open Sans", sans;
font-weight: 400;
color: royalblue;
background: #c6c6c6;
border: 0;
border-radius: 10px;
outline: 0;
text-indent: 65px;
transition: all .3s ease-in-out;
}
.gate::-webkit-input-placeholder {
color: #c6c6c6;
text-indent: 0;
font-weight: 300;
font-size:18px;
}
.gate + label {
display: inline-block;
position: absolute;
top: 0;
left: 0;
padding: 10px 15px;
text-shadow: 0 1px 0 rgba(19, 74, 70, 0.4);
background: royalblue;
transition: all .4s ease-in-out;
border-radius:5px;
transform-origin: left bottom;
z-index: 99;
color:white;
size:18px;
}
.gate + label:before, .gate + label:after {
content: "";
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
border-radius: 10px;
background: royalblue;
transform-origin: left bottom;
transition: all .4s ease-in-out;
pointer-events: none;
z-index: -1;
font-size:18px;
}
.gate + label:before {
background: rgba(3, 36, 41, 0.2);
z-index: -2;
right: 20%;
font-size:18px;
}
span:nth-child(2) .gate {
text-indent: 85px;
}
span:nth-child(2) .gate:focus,
span:nth-child(2) .gate:active {
text-indent: 0;
}
.gate:focus,
.gate:active {
color: ;
text-indent: 0;
background:#c6c6c6;
border-top-right-radius: 3px;
border-bottom-right-radius: 3px;
}
.gate:focus::-webkit-input-placeholder,
.gate:active::-webkit-input-placeholder {
color: floralwhite;
}
.gate:focus + label,
.gate:active + label {
transform: rotate(-66deg);
border-radius: 3px;
}
.gate:focus + label:before,
.gate:active + label:before {
transform: rotate(10deg);
}
.demo-tshirt {
position: relative;
width: 200px;
height: 100px;
margin: 0 0 0 890px;
z-index:999;
}
.demo-tshirt-text {
position: absolute;
top: 30%;
left: 45%;
width: 60%;
transform: translateX( -45%);
font-size:25px;
color: black;
font-family: Arial, sans-serif;
}
.spacereducer101{
margin-top:-80px;
}
<!DOCTYPE html>
<html>
<head>
<title>
T-shirtinator-PERSONALIZE
</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="jquery-1.5.min.js"></script>
<LINK REL="icon" HREF="image/favicon.ico">
<link rel="stylesheet" type="text/css" href="css/pshirts.css">
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<header>
<br>
<img src="image/logo.png" >
<h2 class=tagline>"The T-shirt you design <br>
at your doorstep"</h2>
</header>
<ul>
<li>Home</li>
<li><a class="active" href="#ptshirts">Personalized T-shirts</a></li>
<li class="dropdown">
Buy From Us
<div class="dropdown-content">
Quotes printed T-shirts
Graphic printed T-shirts
Memes printed T-shirts
</div>
</li>
<li>Help</li>
<li>Contact Us</li>
<li onclick="document.getElementById('id02').style.display='block'"style="float:right">Sign Up</li>
<li onclick="document.getElementById('id01').style.display='block'" style="float:right">Login</li>
</ul>
<div class="designcontainer">
<h1>Select Colour</h1>
<button class="colorbutton buttonw">White</button>
<button class="colorbutton buttonr">Red</button>
<button class="colorbutton buttonb">Blue</button>
<button class="colorbutton buttony">Yellow</button>
<h1>Select Size</h1>
<div>
<label class="labelname">
<input type="radio" class="option-input radio" id="size" name="size" value="small" checked />
Small(S)
</label>
<label class="labelname">
<input type="radio" class="option-input radio" id="size" name="size" value="medium" />
Medium(M)
</label>
<label class="labelname">
<input type="radio" class="option-input radio" id="size" name="size" value="large"/>
Large(L)
</label>
</div>
<div class=spacereducer101> </div>
<div class="demo-tshirt">
<div class="demo-tshirt-text"></div>
</div>
<h1>Enter the Text you want on your T-shirt</h1>
<span>
<input type="text" name="tshirt-text" class="tshirt-text gate" id="tshirt-text" placeholder="Max 10 letters.." />
<label for="tshirt-text">Enter</label>
</span>
<br>
<input type="button" id="btn" name="Proceed" value="Proceed" class="colorbutton" style="margin-top:20px; margin-left:200px;">
<iframe name="myiframe" src="iframetshirtwhite.html"></iframe>
</div>
<footer >
Copyright © 2017 www.DAJ.com
</footer>
</body>
</html>
PHP code:
<?php
$connection =mysqli_connect('localhost','root','','textstorage');
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
if($_POST['tshirt-text']){
$tshirt-text =$_POST['tshirt-text'];
$size =$_POST['size'];
$q = "insert into information values('','tshirt-text','size')";
$query = mysqli_query($connection,$q);
if ($query) {
echo"data inserted";
}
}
?>

If you check the console, you'll see that the problem is the first line inside of the javascript click function...
var tshirt-text = $('#tshirt-text').val();
... because '-' is not a valid character for javascript variable names. Just change it by tshirttext (in all your code), and you will see the alert and should be able to go on.
I hope it helps

You've got some errors with you JavaScript. Try running your JavaScript through a validator (for example, http://beautifytools.com/javascript-validator.php) to see where your errors are. In addition to the one A. Iglesias found, you've got an extra clothes parenthesis on line 1, the same tshirt-text error from line 3 is repeated on line 9, and your syntax for an event handler for success on line 13 isn't right, but I can't tell what you're trying to do.
You've also got a conceptual problem. Lines 17 through 22 should be inside your $(document).ready handler. The ready event runs after the initial HTML is loaded into the browser and ready to go, so any reference to HTML elements outside of that event handler may be referring to them before they're ready.
I wanted to make this a comment to your question, but it's too long, so hopefully it's okay an answer. Perhaps once you've fixed some of these JavaScript issues, post an update to your question in the form of an edit and we can then see what else is going on if it's not working.
edit: I reformatted your JavaScript and tried to resolve any syntax errors. If you open up your browser developer tools and run this JS Fiddle (with comments and without comments), you'll see there are no syntax errors in the console. That doesn't mean it works, just that it's syntactically valid. In fact, this shouldn't work, because the AJAX success handler I wrote simply logs the response.
$(document).ready ( // When function parameters and code blocks are big, I like to
// put the opening ( or { at the end of line and put the the
// closing } or ) in the same column way at the end. I find it
// is easier to keep track of openings and closings.
function() { // no extra close parenthesis right after "function"
$("#btn").click(
function()
{
var tshirtText = $('#tshirt-text').val(); // Variable names can only be
// letters, numbers, dollar symbols,
// and underscores. They cannot start
// with numbers.
var size = $('#size').val();
alert("tshirt-text");
$.ajax(
{ // For clarity, I'll separate out the opening ( and opening {
// and the closing } and closing ) when they are one after the other.
type: 'POST'
// I like to put my commas on the next line rather than the previous line.
// I think it makes it more clear that you're moving on to the next thing.
, data: { "tshirt-text": tshirtText, size: size } // You can specify names in
// this JSON-style syntax that
// aren't valid JavaScript
// identifiers, but you have
// to put them in quotes.
, url: "storeinfo.inc.php"
, success: function(data, textStatus, jqXhr)
{
console.log(data);
}
}
);
}
);
var $text = $('.tshirt-text');
var $demoText = $('.demo-tshirt-text');
$text.on(
'keyup'
, function (e) {
$demoText.text($text.val());
}
);
}
);

How can I get the navigation bar to appear and lock on after scrolling 50px down?

I'm making a single page style website and after scrolling 1 px has been scrolled (i.e. the homepage has been passed) I want the navigation bar to appear and stay fixed at the top.
I've tried the .scroll() jQuery and I'm having no luck.
HTML:
<div id="navbar">
<div id="nav-container">
<img id="logonavbar" src="#">
<a id="ABTUS" href="#">ABOUT US</a>
<a id="SRVCS" href="#">SERVICES</a>
<a id="PRTFLO" href="#">PORTFOLIO</a>
<a id="CNTCT" href="#">CONTACT</a>
</div>
</div>
CSS:
#navbar {
width: 100%;
background-color: white;
overflow: auto;
position: fixed;
left: 0px;
top: 0px;
border-bottom: solid;
border-width: 1px;
border-color: #afafaf;
overflow: hidden;
z-index: 10;
display: none;
}
#nav-container {
max-width: 1200px;
min-width: 700px;
margin: 0 auto;
}
#logonavbar {
float: left;
margin: 0 auto;
width: 125px;
padding: 10px 0 0 0;
}
#nav-container a {
float: right;
display: block;
padding: 25px 15px;
text-decoration: none;
color: black;
font-family: "calibri light", calibri,sans-serif;
font-size: 20px;
transition: background-color 0.5s ease;
}
#nav-container a:hover {
background-color: #f4f4f4;
transition: background-color 0.5s ease;
}
#nav-container a:active {
background-color: #bfbfbf;
}
#nav-container h1:hover {
color: #aaaaaa;
transition: color 0.3s ease;
}
jQuery:
$(document).scroll(function() {
if ($document.scrollTop() >= 50) {
$('#nav-container').css('display': 'inline', 'position': 'fixed');
}
});

Here I have made a simple example of a element that sticks to the top of the page after you scroll over it. Maybe it can help you as well!
http://corexsystems.net/2017/09/08/simple-sticky-menu-in-jquery-css3/
Here is the source of this example!
<html>
<head>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.2.1.min.js">
<script>
$(function(){
var pos = $("#topMenuX").offset().top,
win = $(window);
win.on("scroll", function() {
win.scrollTop() >= pos ? $("#topMenuX").addClass("fixed") : $("#topMenuX").removeClass("fixed");
});
});
</script>
<style>
body {
padding:0;
margin:0px;
}
#topMenuX {
background: #666;
padding: 20px;
height:45px;
color: #fff;
}
#topMenuX .insideMenu li {
float:left;
list-style:none;
}
</style>
</head>
<body>
<div id="topMenuX">
<ul class="insideMenu">
<li>CoreXDesigns</li>
<li>Simple Sticky Menu Example</li>
</ul>
</div>
</body>
</html>

Javascript - bring up infobox on click image

I have some images, I need to have a clickevent on them bringing up an infobox on each image.
$('.show-infobox').on('click', function() {
// Hide all infoboxes to prevent multiple showing at once
$('.infobox').addClass('hidden');
// Show infobox background
$('.infobox-container').removeClass('hidden');
// Show infobox matching last part of ID
$('#' + this.id.replace('show')).removeClass('hidden');
});
$('.hide-infobox').on('click', function() {
// Manually hide all infoboxes and background
$('.infobox-container').addClass('hidden');
$('.infobox').addClass('hidden');
}).children().on('click', function() {
return false;
});
#charset "utf-8";
.container {
height: 800px;
width: 1000px;
margin: 0;
}
body {
padding:0px;
width:100%;
}
header
{
top: 11px;
width: 100%;
padding-bottom: 10px;
}
#wrapper{
margin-left: auto;
margin-right: auto;
width: 1000px;
}
ol {
list-style-type: upper-roman;
}
H3 {
font-size:16px;
text-shadow: 0px 0px 5px grey;
}
.mainBox
{
background-color: #F0F0F0;
width: 700px;
box-shadow: 0px 0px 15px grey;
top: 310px;
border-radius: 20px;
padding-top: 30px;
padding-right: 50px;
padding-left: 50px;
}
.container nav ul {
list-style-type: none;
}
nav
{
width: 720px;
height:40px;
background-color: #F0F0F0;
border-color: grey;
border-width: 1px;
border-style: solid;
border-radius: 10px;
font-family: 'PT Sans';
font-size: 20px;
margin-bottom:50px;
}
ul{
padding-right: 20px;
margin-top: 6px;
}
a {
color: black;
text-decoration: none;
padding: 25px;
}
a:hover
{
color:#00A0C6;
text-decoration:none;
cursor:pointer;
}
.imagePack
{
float:left;
height: 300px;
width: 200px;
border-style:solid;
}
img.staff {
cursor: pointer;
opacity: 0.4;
filter: alpha(opacity=40); /* For IE8 and earlier */
}
img.staff:hover {
opacity: 1.0;
filter: alpha(opacity=100); /* For IE8 and earlier */
}
.infobox-container {
background: rgba(0, 0, 0, .2);
width: 100%;
height: 100%;
position: absolute;
display: flex;
justify-content: center;
align-items: center;
}
.infobox {
background: #fff;
display: inline-block;
padding: 2rem;
border: solid 1px #eee;
}
.show-infobox {
cursor: pointer;
}
.hidden {
display: none;
}
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<head>
<title>Test</title>
<link href="style.css" rel="stylesheet" type="text/css" />
<script src="jquery-2.1.4.js"></script>
<script>
$( document ).ready(function() {
$('.show-infobox').on('click', function() {
// Hide all infoboxes to prevent multiple showing at once
$('.infobox').addClass('hidden');
// Show infobox background
$('.infobox-container').removeClass('hidden');
// Show infobox matching last part of ID
$('#' + this.id.replace('show')).removeClass('hidden');
});
$('.hide-infobox').on('click', function() {
// Manually hide all infoboxes and background
$('.infobox-container').addClass('hidden');
$('.infobox').addClass('hidden');
}).children().on('click', function() {
return false;
});
});
</script>
<div id="wrapper">
<center><header><img src="Bilder/spegel.jpg"/></header></center>
</head>
<!--Bakgrundsbild-->
<center><body bgcolor="#FFFFFF ">
<!--Javascript-->
<!--Lådan som håller inne allt innehåll-->
<div class="container">
<!--Header-->
<!--Nedan skrivs innehål/text till sidan-->
<div class="mainBox">
<center><img src="Bilder/title.png"></center>
<p>
<div class="infobox-container hide-infobox hidden">
<div id="infobox-1" class="infobox hidden">This is infobox 1! <span class="hide-infobox">[close]</span></div>
<div id="infobox-2" class="infobox hidden">This is infobox 2! <span class="hide-infobox">[close]</span></div>
</div>
<span id="show-infobox-1" class="show-infobox">Show infobox 1</span>
<span id="show-infobox-2" class="show-infobox">Show infobox 2</span>
</div>
</body></center>
</div>
</html>
At the moment Im just trying to bring up the infobox on a simple text just to see if it works. But it doesn't. Only the container comes up without the actual infobox.

I am just showing how this can be done. Still you need to change your code a lot.
I suggest you to go through w3schools for better understanding.
This is DEMO
$(".infobox-container, .infobox").hide();
$(".show-infobox").click(function()
{
var curId = this.id;
if(curId == "show1")
{
$(".infobox-container, #infobox-1").fadeIn(100);
}
if(curId == "show2")
{
$(".infobox-container, #infobox-2").fadeIn(100);
}
});
$(".hide-infobox").click(function()
{
$(".infobox-container, .infobox").fadeOut();
});
#charset"utf-8";
.container {
height: 800px;
width: 1000px;
margin: 0;
}
body {
padding:0px;
width:100%;
}
header {
top: 11px;
width: 100%;
padding-bottom: 10px;
}
#wrapper {
margin-left: auto;
margin-right: auto;
width: 1000px;
}
ol {
list-style-type: upper-roman;
}
H3 {
font-size:16px;
text-shadow: 0px 0px 5px grey;
}
.mainBox {
background-color: #F0F0F0;
width: 700px;
box-shadow: 0px 0px 15px grey;
top: 310px;
border-radius: 20px;
padding-top: 30px;
padding-right: 50px;
padding-left: 50px;
}
.container nav ul {
list-style-type: none;
}
nav {
width: 720px;
height:40px;
background-color: #F0F0F0;
border-color: grey;
border-width: 1px;
border-style: solid;
border-radius: 10px;
font-family:'PT Sans';
font-size: 20px;
margin-bottom:50px;
}
ul {
padding-right: 20px;
margin-top: 6px;
}
a {
color: black;
text-decoration: none;
padding: 25px;
}
a:hover {
color:#00A0C6;
text-decoration:none;
cursor:pointer;
}
.imagePack {
float:left;
height: 300px;
width: 200px;
border-style:solid;
}
img.staff {
cursor: pointer;
opacity: 0.4;
filter: alpha(opacity=40);
/* For IE8 and earlier */
}
img.staff:hover {
opacity: 1.0;
filter: alpha(opacity=100);
/* For IE8 and earlier */
}
.infobox-container {
background: rgba(0, 0, 0, .2);
width: 100%;
height: 100%;
position: absolute;
display: flex;
justify-content: center;
align-items: center;
}
.infobox {
background: #fff;
display: inline-block;
padding: 2em;
border: solid 1px #eee;
}
.show-infobox {
cursor: pointer;
}
.hidden {
display: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div id="wrapper">
<center>
<header>
<img src="Bilder/spegel.jpg" />
</header>
</center>
<center>
<!--Lådan som håller inne allt innehåll-->
<div class="container">
<!--Header-->
<!--Nedan skrivs innehål/text till sidan-->
<div class="mainBox">
<center>
<img src="Bilder/title.png" />
</center>
<p>
<div class="infobox-container">
<div id="infobox-1" class="infobox">This is infobox 1! <span class="hide-infobox">[close]</span></div>
<div id="infobox-2" class="infobox">This is infobox 2! <span class="hide-infobox">[close]</span></div>
</div>
</p>
<span class="show-infobox" id="show1">Show infobox 1</span>
<span class="show-infobox" id="show2">Show infobox 2</span>
</div>
</div>
</center>
</div>