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Same animation is taking longer in different directions

I have an image slider, it's going to the next/previous image fine.
The problem is that when you click the previous image button, the animation takes longer than when you click in the next image button, and the animation is the same for both!Can you tell me why is this happening?
JSFIDDLE:
http://jsfiddle.net/v6d16jza/
HTML:
<div id="slider">
<div id="setas-navegacao" style="position:absolute;height:100%;width:100%;">
<i class="sprite-slider_ant" style="z-index:1;position:absolute;left:1.7%;top:50%;color:#ffa500;font-size:15pt;"><</i>
<i class="sprite-slider_prox" style="z-index:1;position:absolute;right:68.5%;top:50%;color:#ffa500;font-size:15pt;">></i>
</div>
<div class="slide slide_ativo" style="background-image:url('http://www.hdwallpapersimages.com/wp-content/uploads/2014/01/Winter-Tiger-Wild-Cat-Images-540x303.jpg');">
</div>
<div class="slide" style="background-image:url('http://www.gettyimages.co.uk/gi-resources/images/Homepage/Category-Creative/UK/UK_Creative_462809583.jpg');">
</div>
<div class="slide" style="background-image:url('http://7-themes.com/data_images/out/42/6914793-tropical-beach-images.jpg');">
</div>
</div>
CSS:
html{
overflow: hidden;
width:100%;
}
div#slider{
position:relative;
overflow: hidden;
width: 300%;
height:300px;
}
.slide{
position:relative;
width:33.3%;
height:100%;
float:left;
background-size: cover;
-webkit-transform: translateZ(0);
-webkit-transition: margin-left 0.9s ease-out;
-moz-transition: margin-left 0.9s ease-out;
-o-transition: margin-left 0.9s ease-out;
transition: margin-left 0.9s ease-out;
}
jQuery:
$(".sprite-slider_prox").on("click", function(){
if($(".slide_ativo").next().is(".slide")){
$(".slide_ativo").css("margin-left", "-100%").removeClass("slide_ativo").next().addClass("slide_ativo");
}
});
$(".sprite-slider_ant").on("click", function(){
if($(".slide_ativo").prev().is(".slide")){
$(".slide_ativo").removeClass("slide_ativo").prev().css("margin-left", "0%").addClass("slide_ativo");
}
});

You are adding more margin than it's actually needed to shift the image to the left.
You can see what's happening with the Chrome inspector, hovering the images while they change (raising the animation time to some higher value will help you). You will notice that the delay before the slider starts moving back is spent removing the extra margin.
I recorded a video of the debugging.
If you change:
.css("margin-left", "-100%")
to:
.css("margin-left", "-33.333%")
the animation will work correctly (see the fiddle)
Also, note that I had to remove the padding and margin from html and body elements to achieve the correct shifting.

How can I create a "game over" image zoom into the screen using HTML & Javascript?

I am currently developing a HTML game for one of my programming classes and I want to add a "game over" screen that will display an image and information on their score before dying.
What I would like to happen is for the image to overlay the body of the page and start small in the middle of the screen and "expand" or zoom into the screen to a specific size. I'm not sure if that's clear but here is what I'm sort of looking for:
But I would like it to zoom in rather than just appear. Any links or help would be greatly appreciated because I don't even know what to search on google to get information on this!
Thanks in advance for any help!

It's really rough but you can do something like this:
JS
var $foo = $('#foo');
grow = function (size) {
if (size < 50) {
console.log(size);
$foo.css('width', size + '%');
$foo.css('height', size + '%');
size++;
setTimeout(grow, 10, size);
}
}
grow(0);
CSS
#foo {
position: fixed;
right: 0;
left: 0;
top:0;
bottom: 0;
margin-left: auto;
margin-right: auto;
margin-top:auto;
margin-bottom:auto;
width: 0%;
height: 0%;
background-color: red;
}
https://jsfiddle.net/a05s1a44/
Change the timeout length to control the speed. Adjust the CSS as needed. Scale the size variable for the dimensions of your box. Change the limit. Do whatever. Should be enough to get you going.

FIDDLE: https://jsfiddle.net/shfv0b3f/
Using transform: scale and transition:
div {
-webkit-transform: scale(0);
-moz-transform: scale(0);
-o-transform: scale(0);
transform: scale(0);
}
On game over:
div.zoom {
transform: scale(1);
}

This is what I have made for you and I hope it would help.
basically in a container which it may be the window of your game, I have added the "game over" container you want to show.
The rest of the html is just so you see some false content inside game container:
<div class="container">
<div class="stuff">and here is stuff</div>
<div class="stuff">etc, ect, ect</div>
<div class="stuff">more text</div>
<div class="stuff">and more</div>
<div class="button">Click here</div>
<div class="this-is-your-game-over"></div>
</div>
You can see there's also a class called button that I have used as to trigger the "game over" container zoom effect. In your game development you may use something else to do it.
Then, basically, you will have a "game over" container positioned as this:
.this-is-your-game-over {
position:absolute;
height:0px;
width:0px;
background-color:blue;
right:0;
left:0;
bottom:0;
top:0;
margin: auto;
}
so It is always centered and by jquery:
$(document).ready(function () {
$('.button').click(function () {
$('.this-is-your-game-over').toggleClass("this-is-your-game-over-ADDED");
});
});
When you click on button you add another class to the "game over" container that will make it grow to your desire size with a simple transition:
.this-is-your-game-over-ADDED {
height:80%;
width:50%;
-webkit-transition: all 0.5s linear;
-moz-transition: all 0.5s linear;
-ms-transition: all 0.5s linear;
-o-transition: all 0.5s linear;
transition: all 0.5s linear;
}
This is the FIDDLE to see verything in action
important: If in your html the this-is-your-game-over div is not at the end of your html you may need to add a positive z-indexto it.

This is perfect use case for CSS transitions and transforms.
Very basically:
#image {
transition: all 0.5s;
}
#image.hidden {
visibility: hidden;
opacity: 0;
transform: scale(0.5);
}
Then you just toggle the .hidden class somehow, probably by JS.
Also, don't forget to add vendor prefixes (or use Autoprefixer).
See http://codepen.io/anon/pen/waaMvM for better example.

Add animation to scrolltop menu

so i was messing around with getting menu to animate in after a certain div. I got it to work to show up but not to actually animate. I have already tried some different things with like .animate or fadein but it didnt work. Not sure what im doing wrong but mind you i am a jquery noob.
So my question is how can i easily animate this?
my code:
/* Menu show */
$(window).scroll(function () {
var menuBG = $('.menu'),
targetScroll = $('#slide2').position().top,
currentScroll = $('html').scrollTop() || $('body').scrollTop();
menuBG.toggleClass('show-menu', currentScroll >= targetScroll);
});

There are plenty of ways to achieve this. I'll demonstrate two one based on jQuery with some changes to the original code and another on CSS3 with no changes to the original code but some additions in css.
example 1 - jquery
jsFiddle
html
<div class="menu">this is the red menu</div>
<div id="slide2">this the blue slide2</div>
css
.menu{
height:50px;
background-color:red;
display:none;
position:fixed;
}
/*.menu.show-menu{
display:block;
}*/
#slide2{
height:800px;
background-color:blue;
}
js
$(window).scroll(function () {
var menuBG = $('.menu'),
targetScroll = $('#slide2').position().top,
currentScroll = $('html').scrollTop() || $('body').scrollTop();
//menuBG.toggleClass('show-menu', currentScroll >= targetScroll);
if(currentScroll>=targetScroll){
$('.menu').fadeIn(1000);
$('.menu').addClass('show-menu');
}else{
$('.menu').stop();
$('.menu').removeClass('show-menu');
$('.menu').fadeOut(500);
}
});
example 2 - css3
jsFiddle
css
.menu{
transition: opacity 1s ease-in-out;
-moz-transition: opacity 1s ease-in-out;
-webkit-transition: opacity 1s ease-in-out;
height:50px;
background-color:red;
/* display:none; */
opacity:0;
position:fixed;
}
.menu.show-menu{
/* display:block; */
opacity:1;
}
#slide2{
height:800px;
background-color:blue;
}

CSS3 translateX confusion

The problem is, that translateX is not changing it's position right before animating. In the example problematic slide is #slide2, i'm changing it's position before animating and it still animate from the wrong side.
How to fix that behavior? Using css left property instead is fixing this, but i want to use translateX.
Thanks.
html:
<div id="slide1"></div>
<div id="slide2"></div>
css:
div {
position:absolute;
left:0px;
top:0px;
background:red;
width:100%;
height:300px;
-webkit-transition: all 0.4s linear;
}
#slide2 {
background:blue;
-webkit-transform: translateX(100%);
}
javascript:
$('#slide2')
.css('-webkit-transition','none')
.css('-webkit-transform','translateX(-100%)');
$('#slide1').css('-webkit-transform','translateX(100%)');
$('#slide2')
.css('-webkit-transition','all 0.4s linear')
.css('-webkit-transform','translateX(0%)');
jsfiddle playground:
http://jsfiddle.net/D5d9e/

Updated - Try this:
$('#slide2')
.css('-webkit-transition','none')
.css('-webkit-transform','translateX(-100%)')
.css('-webkit-transform'); // wtf happens here
Fiddle: http://jsfiddle.net/D5d9e/6/
This works... for some reason.

how to change div background-color with fadeIn/Out?

How to change div background-color with fadeIn/Out,I only want to fade background color,not background image,Please give me some useful code or solution

Although only supported by modern browsers you might also consider using CSS transitions to achieve the same effect
HTML
<div class='foobar'></div>
CSS
.foobar {
/* transition properties */
transition: background-color 2s;
-moz-transition: background-color 2s;
-webkit-transition: background-color 2s;
-o-transition: background-color 2s;
/* basic styling & initial background-color */
background-color:maroon;
width:100px;
height:100px;
}
/* Change background color on mouse over */
.foobar:hover {
background-color:blue;
}
Working example here, http://jsfiddle.net/eRW57/14/

<script>
$(document).ready(function(){
$("p").toggle(function(){
$("body").css("background-color","green");},
function(){
$("body").css("background-color","red");},
function(){
$("body").css("background-color","yellow");}
);
});
</script>
try it.. that should work fine

You can't fade just the background (color or otherwise) of an element using jQuery's fadeIn/fadeOut.
What you can do is place an additional layer (DIV, etc) with your background color and fade in/out on that.
Instead of something like this:
<div id="my-background"></div>
Use this structure:
<div id="container">
<div id="my-background"></div>
</div>
CSS
#container
{
position:relative;
width:200px;
height:100px;
background-image:url(my-background-image.jpg);
}
#my-background
{
height:100%;
width:100%;
background-color:blue;
position:absolute;
z-index:99;
}
Then use jQuery's fadeIn/fadeOut methods
JS
jQuery("#my-background").fadeOut();

with this you can fadeout all div's with id #my-background
var $div = $('#my-background');
$div.each(function blank(){
$(this).animate({'backgroundColor': '#fff'},2000);
});