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mouseover animation weird behaviour

I'm creating a simple animation with jquery.
The animation consists on a div being slided left when the mouse hovers it.
This is my html:
<div class="item">
<div class="content" onmouseover="over(this)" onmouseout="out(this)">
<div class="image">
<img src="http://aranciamato.it/wp-content/uploads/2013/09/insetti-700x250.jpg" width="300"/>
</div>
<div class="text">
Some useful content
</div>
</div>
</div>
This is the js:
function over(element) {
$(element).stop().animate({left: "-250"}, 500);
}
function out(element) {
$(element).stop().animate({left: "0"}, 500);
}
This is the css:
.item {
position: relative;
width: 300px;
height: 107px;
overflow:hidden;
}
.item .content {
position: absolute;
top:0;
left:0;
width: 600px;
height: 107px;
}
.item .content .image {
position:absolute;
top: 0;
left: 0;
}
.item .content .text{
position:absolute;
top: 0;
left: 300px;
width: 250px
}
.item {
border: 1px solid black;
}
The animation works properly, but I noticed that if you move the cursor over the left border of the .image div while the animation is running, it pauses for a moment and then resumes.
I don't know how to explain this better, so here you can find a JSFiddle, and here you can find a video that demonstrates the behaviour
My question is: Why is the animation behaving like this? How can I make the animation continue without pausing?

Use mouseenter and mouseleave instead
<div class="content" onmouseenter="over(this)" onmouseleave="out(this)">
DEMO

Your jsfiddle is working for me. Also, its better for you to use the $(el).hover() function jQuery provides, for example:
$('.content').hover(function() {
// Mouseover
}, function() {
// Mouseout
});

Well, you can use your hover event on the parent element (in this case .item) and animate the child element (.content). If you're using jQuery, just use .hover () instead of those two mouse events.

When you move the cursor out of the image div then a mouseout event fires - you move out of the image - and the out function is called, making the animation stop. Right after that the mouseover event fires - you move over the text - and the over function is called.
You attached the event handlers to the content div, i.e. they are called whenever the event fires on itself, but also when the event fires on one of it's descendants.
The reason why it's working with mousenter and mouseleave is that those events are handled differently by the browser. But be aware that they are not supported by all browsers.

javascript window scroll issue

I am working on javascript scroll. I have following html code
JSFIDDLE
<div class="wrapper">
<div class="red div current"></div>
<div class="blue div"></div>
<div class="green div"></div>
<div class="yellow div"></div>
</div>
In above code I have four div tags red, blue, green and yellow. All of them are position in following css.
html, body {
height: 100%;
}
.wrapper {
overflow: hidden;
height: 100%;
}
.div {
position: relative;
height: 100%;
}
.red {
background: red;
}
.blue {
background: blue;
}
.green {
background: green;
}
.yellow {
background: yellow;
}
In above html and css the red div tag is the current one which means user is seeing the red div tag on the screen. Now what I am trying to do is when user scroll over window once, then the next div tag i.e. blue will be animated and moved to the top and will become visible to the user whereas the red div tag will be behind the blue one. This same process goes for both green and yellow.
The problem is that when user scroll once then the div tag should animate however my current javascript code is keep reading the scroll and animating the div tags one after another. What I want is when user scroll once then scroll should be disabled until the blue div tag is animated. Then scroll should be enabled. Again when user scroll second time, the scroll should disable until the green div tag completes its animation. Same goes for yellow.
How can I achieve above?
Here is my javascript
$(window).on("scroll", function () {
var next = $('.current').next();
var height = next.outerHeight();
next.animate({top: '-=' + height}, 500, function () {
$(this).prev().removeClass('current');
$(this).addClass('current');
});
});

Please have a look on update JsFiddle
$(window).on("scroll", function () {
var next = $('.current').next();
var height = $('.current').outerHeight();
$('.current').prevAll().each(function(){
height += $(this).outerHeight();
});
next.animate({top: '-=' + height}, 500, function () {
$(this).prev().css('top','');
$(this).prev().toggleClass('current');
$(this).toggleClass('current');
});
});

The main reason your example wasn't working as expected is because you were relatively positioning the divs, and not moving them to the correct spot.
Working JSFiddle:
http://jsfiddle.net/seanjohnson08/rVVuc/6/
.wrapper {
overflow: hidden;
height: 100%;
position: relative;
}
.div {
position: absolute;
height: 100%;
width: 100%;
top: 100%;
}
.current{
top: 0;
}
If you are looking for a way to limit the amount of scroll events fired, try throttling: http://benalman.com/projects/jquery-throttle-debounce-plugin/. My solution doesn't require this, because no matter how many times it is firing the scroll event, it only ever tells jquery to animate to top:0, there's no chance of it animating past that.

Change Background when part of it is hovered

i am totally new in web design, and i am right now struggling with creating part of my website, i need to somehow make this happen:
When PART of the BODY BACKGROUND is HOVERED, make the background change to "B", and when the mouse is not over that part, I need it to change back to background "A".
I have seen some examples here but as i am a beginner, i have no idea how to use javascript, if you could please give me some light here, either on pure CSS or on how to apply javascript.

This is accomplished very easily using a third party javascript library called JQuery http://jquery.com, you can see a working example here: http://jsfiddle.net/bbp8G/
$(document).ready(function(){
$("#hover").mouseenter(function(){
$(this).css("background","#009900");
}).mouseleave(function(){
$(this).css("background","#ffffff");
});
});

Here's the easiest way I know how to do what you've described...
<!-- POSITION THIS DIV WHEREVER YOU WANT THE
USER TO HOVER SO THAT THE BACKGROUND WILL CHANGE -->
<div id="hover">
</div>
<!-- PUT THIS CODE IN YOUR <HEAD> -->
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js" />
<style>
#hover { width: 200px; height: 200px; position: relative; top: 200px; background: green; }
.myNewBackround { background-color: red; }
</style>
<script>
$(document).ready(function() {
// when the #hover DIV is hovered, change the background of the body
$('#hover').hover(function() {
$('body').addClass('myNewBackground');
});
});
</script>
Here's a JS FIDDLE:
http://jsfiddle.net/ZKaJn/

Or you can do it with pure CSS
<div id="left"> </div>
<div id="right"> </div>
And the CSS part:
#left
{
background-color:#000;
float:left;
width:50%;
height:200px;
}
#right
{
background-color:#FF0;
float:right;
width:50%;
height:200px;
}
#right:hover
{
background-color:#00F;
}
#left:hover
{
background-color:#F00;
}
You can replace the div's and values with whatever you like, the main part is the #right:hover and #left:hover

Actually with just css it is not possible to change the background of the body when hovering a DOM element. This is because CSS does not allow you (yet) to travel up the DOM tree (select a parent), only down (select a child).
That being said, it is however possible to mimic the effect, and it is even quiet easy if it is the body background you want to change. You can lay a pseudo element with a background on top of your body background, and underneath the actual content. This way it looks as if the body background has changed.
The css to achieve this would look something like this:
.hover-me:hover:after {
content: '';
top: 0;
left: 0;
right: 0;
bottom: 0;
position: fixed;
background: url(http://placekitten.com/600/300) center center;
background-size: cover;
z-index: -1;
}
And a small fiddle to demonstrate: http://jsfiddle.net/3dwzt/
Should be compatible with IE8 and up

How to make divs rise up from other divs?

I know how to stack divs on top of divs by doing position:absolute for the parent and position:relative for the children, but how can I make a div "rise up" from another div? An example of what I want to achieve is here. Scroll to the bottom and hover your mouse over the artwork.

What you can do is absolute position that pop-up in a relative positioned box, for example:
<div class="featured-image">
<div class="caption">
<p>This is where your text goes</p>
</div>
</div>
Now that you have that, you'll want to make the caption invisible unless scrolled over. So, a simple way to do this with just CSS is:
.featured-image { position:relative; width:300px; height: 400px; }
.caption { position:absolute; bottom:0; display:none; }
.feature-image:hover > .caption { display:block; }
The last line makes it seen when you mouse-over the image.
Then you could animate it with jQuery easily. That appears to be what they're using.
$(document).ready(function(e) {
$(".caption").hide();
});
var show = function() {
$(".caption", this).stop(true, true).show(500)
};
var hide = function() {
$(".caption", this).stop(true, true).hide(500);
};
$(".featured-image").hover(show, hide);

HTMl
<div id="pic">
<div>
</div>
</div>
CSS
#pic {
position: relative;
background: yellow;
width: 100px;
height: 100px;
overflow: hidden;
}
#pic div {
position: absolute;
bottom: -50px;
background: black;
height: 50px;
width: 100px;
}
JQuery
$('#pic').hover(
function(){
$(this).find('div').stop(true, true).animate({
'bottom': '+=50'
}, 100);
},
function(){
$(this).find('div').stop(true, true).animate({
'bottom': '-=50'
}, 100);
}
);
jsfiddle: http://jsfiddle.net/Z6eLa/2/

Introduce yourself to jQuery and z-index.
http://api.jquery.com/slideDown/
The trick here is slidedown will make your top div slide down. The only thing that comes to my mind, is instead of expanding that bottom div up, do the opposite. Get the top div, and have it slide-up, while the other div is displayed behind it. It should give the appearance of the bottom div 'sliding-up'.
Note, sorry if this doesn't work. I'm actually not sure if you can get it to slide only halfway up instead of all the way...good luck though!

You don't need JS for that, just use css3 transitions.

jquery slideshow using background images

I have a div which currently has a static background image.
I need to create a slideshow of background images for this div.
I am able to achieve this by just setting a timeout and then changing the background image in the CSS but this is not very elegant.
I would ideally like to fade the background images out and in, but the div contains other page elements so I can not alter the opacity in any way.
Does anyone know of a good way to do this using jquery??
Here's some code which fades out/in but fades out the contents of the div too.
$("#slideshow").fadeOut(5000, function(){
$("#slideshow").css('background-image','url(myImage.jpg)');
$("#slideshow").fadeIn(5000);
});

HTML:
<div class="slideshow"></div>
CSS:
.slideshow
{
position: relative;
width: 350px;
height: 150px;
}
.slideshow img
{
position: absolute;
width: 350px;
height: 150px;
z-index:-1;
}
jQuery
var images=new Array('http://placehold.it/250x150','http://placehold.it/250x150/123456','http://placehold.it/250x150/dbca98');
var nextimage=0;
doSlideshow();
function doSlideshow()
{
if($('.slideshowimage').length!=0)
{
$('.slideshowimage').fadeOut(500,function(){slideshowFadeIn();$(this).remove()});
}
else
{
slideshowFadeIn();
}
}
function slideshowFadeIn()
{
$('.slideshow').prepend($('<img class="slideshowimage" src="'+images[nextimage++]+'" style="display:none">').fadeIn(500,function(){setTimeout(doSlideshow,1000);}));
if(nextimage>=images.length)
nextimage=0;
}
jsfiddle Demo

How about adding a thumbs pagination list, to update the background image on click, and then, a second or two, and it starts fading in and out with the next bg img automatically?
HTML:
<div class="slideshow">
<h1>Text</h1>
<input type="button" value="Hello" />
</div>
<ul>
<li><img src="http://placehold.it/50x50"></li>
<li><img src="http://placehold.it/50x50/123456"></li>
<li><img src="http://placehold.it/50x50/dbca98"></li>
</ul>
CSS:
.slideshow
{
position: relative;
width: 350px;
height: 150px;
}
.slideshow img
{
position: absolute;
width: 350px;
height: 150px;
z-index:-1;
}
ul {position: absolute; top: 125px; left: 75px;}
li {
float: left;
border: 1px solid #000;
margin: 15px;
}
Javascript:
var images=new Array('http://placehold.it/250x150','http://placehold.it/250x150/123456','http://placehold.it/250x150/dbca98');
var nextimage=0;
doSlideshow();
function doSlideshow()
{
if($('.slideshowimage').length!=0)
{
$('.slideshowimage').fadeOut(500,function(){slideshowFadeIn();$(this).remove()});
}
else
{
slideshowFadeIn();
}
}
function slideshowFadeIn()
{
$('.slideshow').prepend($('<img class="slideshowimage" src="'+images[nextimage++]+'" style="display:none">').fadeIn(500,function(){setTimeout(doSlideshow,1000);}));
if(nextimage>=images.length)
nextimage=0;
}
See it all together at http://jsfiddle.net/tatygrassini/R4ZHX/75/.

Instead of just changing the background image, you could first call
fadeOut()
then change source, and then call
fadeIn()
something like...
$('#image').fadeOut(500, function() {
$(this).attr('src', 'new-image.png')
.load(function() {
$(this).fadeIn();
});
});
To use a variety of images, there are a number of solutions, but you could simply iterate through a list of them.

You can create an positioned absolutely and with a slider plugin change the images contained in the div. Otherwize you have to sprite the background. I achieved this with the Jquery Tools tabs plugin.
$(".slidetabs").tabs(".images > div", {
// enable "cross-fading" effect
effect: 'fade',
fadeOutSpeed: "slow",
// start from the beginning after the last tab
rotate: true
// use the slideshow plugin. It accepts its own configuration
}).slideshow();

Here is a solution that not only addresses your problem, but will also solve some other problems as well. Create another DIV on your DOM as an overlay, and execute your fade functions on this DIV only. It will appear as though the content is fading in / out. This approach is also more performant, as you are only fading a single DIV instead of multiple elements. Here is an example:
$('#containeroverlay').width($('#container').width()).height($('#container').height()).fadeIn('normal', function() {
// Step 1: change your content underneath the hidden div
// Step 2: hide the overlay
$('#containeroverlay').fadeOut('normal');
})
Most importantly, this approach will work in IE6-8 without screwing up the font aliasing of elements you may have on the div.