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Topbar covering webpage header

I'm making a website and want a navigation bar that stays at the top of the screen. I can do this fine but when I scroll to top it goes above header. How do I get it to stop scrolling with the user before the top of the page? I have watched countless tutorials but none seem to work. I think I need JavaScript to unstick the bar at a certain height, but unsure how. Also how do I restick it when the user scrolls back down?

Yes, you will need JavaScript to handle this. It is not too complicated, but you will basically need to add an event handler for the scroll event on the window, and inside the handler you can check the scrollTop of the window to see how much has been scrolled. When it has been scrolled "enough" (usually the height of your header) you can then switch the position of the header to fixed.
You can see a demo about it on the excellent CSS Tricks, and there are many tutorials and plugins that can help with this.

Yes, as danwellman said, you need js.
I have a small code I used in my webpage.
// Highlight the top nav as scrolling occurs
$('body').scrollspy({
target: '.navbar-fixed-top',
offset: 51
});
You need a file like "scrolling-nav.js" or anything you prefer. And in your html, don't forget to call it.
// In the end or in the beggining you call your js file
<script src="...(filepath)/scrolling-nav.js"></script>
There are many more cool possible snippets you can find. This is really to keep the navbar fixed after the offset of '51'. You can also add the smoothed movement to the webpage section after selecting a menu button.. If you have a onepage website, for example. This would also be js.
Good luck. :)

How do I make a smooth transition when moving an element from margin-left:-9999px to the page?

Here's some more details - due to some weird restrictions with the YouTube API, I am forced to push a container off the page to give the impression of hiding the container.
I achieve this by using this class:
.my_hide{
margin-left:-9999px;
position:fixed !important;
}
And by using the JQuery methods $("player-list_container").removeClass("my_hide") and $("player-list_container").addClass("my_hide") to control the toggling.
However, the toggling looks jaunty, and the container jumps up once the class is removed. I want to be able to transition smoothly from one state to the other, and am at a loss for how to do it.
This behaviour can be demonstrated here
Add a video by typing in and searching for anything, and then hit the Play button located below. You should observe the behaviour described.

Iam assuming you 'are not able to'/'not want to' manually hide the container but want to change its position so that it is outside the boundaries of the page and it looks hidden.
In that case changing the position property will definitely give you a jumpy instead of a smooth effect since this affects the whole layout of the page (Read more). What you can instead do is change its position using CSS3 animation's translate property.
Here's a demo I've coded which does exactly what you want.
http://codepen.io/anon/pen/EgcIi
The "Click me" button toggles between taking the container off and on the page and it does it smoothly. You can also adjust the time which it takes to change the position of container. (As of now its 500ms)

I want it to look like the container is fading in in position meaning I would have to get the container to that position before using any type of animation function.
Then, don't throw the element way off the page with CSS. Leave it where it is, and hide it with .hide(). Then fade it in with .fadeIn().
You'll need to manually size the container, as it won't expand to contain a hidden element.

On my screen it just popped up. Im not 100% sure what type of pop in effect you want but that said, check out http://api.jquery.com/animate/
i was going to code up an example but that page has a bunch!
good luck!
PS: scroll down for all the visual animation examples.
Here is some sample code:
$('#myBtn').click(function(){
$( '.ytv' ).fadeTo( "fast", Math.random() );
//add animation code here;
});
check out a rough fiddle.
edit: heres a rough example: http://jsfiddle.net/somdow/Lef9n/2/
just click the red area to the right of the video

Animate function in jQuery wll help you

jQuery div autoscroller solution

I need a jQuery scroller to scroll my divs with auto scrolling facility. I am looking for something like jCarousel.
But there are limitations for this. What I want is one which;
1. Scrolls <div>s (or some html elements) and not just images. I may have something like the picture below, to scroll.
It is a text and image combination.
2. It should auto scroll contents
3. The slider should MARQUE continuously and should not rewind to beginning. The slider should not rewind (in the opposite direction) to go for first image/content after the last image/content.
What jcarousel is doing is in autoscroll mode, it shows a set of of images/contents at a time, stop for a while, and then immediately displays the next set. I don't want this and want to autoscroll contents smoothly in a loop. That is, first content should come after last content, in circular loop.
I can provide additional details. just post comments.
Anybody got what I am trying to say and what I want and suggest me a solution?

You can do this without a plugin with some fairly simple jQuery.
See an example here that I put together for another answer:
http://jsfiddle.net/6Dxg6/
Basically, the idea is you clone the contents of a wrapper, and then continually move the contents to the right/left the width of the original content and then reset. Works with any content.
That code even includes hover-stop functionality. Without that, the code is simpler still:
http://jsfiddle.net/qJZtp/1/

Javascript or Jquery: Scroll to Fixed position div

I want a html div which will scroll when user scroll down the page and it will get to fixed position when it's parent tag ends. For example:- See this link http://www.9gag.com/ they have alot to posts on one page. When we scroll one post and go to end of the first post, the title and share buttons become to fixed position and then the second post do the same and same for the next posts. Just exactly like that. How can we do this in Jquery or raw javascript or in css.

Maybe you want to try this plugin: http://labs.anthonygarand.com/sticky/ Sticky is a jQuery plugin that gives you the ability to
make any element on your page always stay visible by making the element to be floated when they has reached the limit.

$(window).scrollTop() will give you the number of pixels scrolled down in the browser, $('postcontainer').offset() will give you the x,y positions of a post container.
So if you bind an event to $(window).scroll() or to the mousescroll, you can check if the postcontainer's offset().top is less than the window.scrollTop. If it is then you start moving the item down relative to the post container. When doing this you need to keep track of the post container's height and the moving element's height to make sure it doesn't go down past the bottom of the container.
So if postcontainer.height - movingelement.position().top >= movingelement.height() then you need to fix the position of the moving element. Do the opposite while scrolling back up.
Hopefully this will get you thinking and starting to kick out some code.

This is the solution for your problem with a simple css property.
use position:sticky to follows the scroll.
Here is the article explained.
http://updates.html5rocks.com/2012/08/Stick-your-landings-position-sticky-lands-in-WebKit
and old way of doing this demo
with sticky position demo

Does scrollIntoView work in all browsers?

Does scrollIntoView() work in all browsers? If not is there a jQuery alternative?

It is supported yes, but user experience is... bad.
As #9bits pointed out, this has long been supported by all major browsers. Not to worry about that. The main problem is the way that it works. It simply jumps to a particular element that may as well be at the end of the page. By jumping to it, users have no idea whether:
page has been scrolled up
page has been scrolled down
they've been redirected elsewhere
The first two can be determined by scroll position, but who says users kept track of scroll position before jump was done? So it's an nondeterministic action.
The last one may be true especially if the page has moving header that gets scrolled out of view and remaining page design doesn't imply anything on being on the same page (if it also doesn't have any total height vertical element like left menu bar). You'd be surprised how many pages have this problem. just check them out yourself. Go to some page, look at it at top, then press End key and look at it again. It is likely that you'll think it's a different page.
Animated scrollintoview jQuery plugin to the rescue
That's why there still are plugins that perform scroll into view instead of using native DOM function. They usually animate scrolling which eliminates all 3 issues outlined above. Users can easily keep track of the movement.

Looks like it does: http://www.quirksmode.org/dom/w3c_cssom.html

I use Matteo Spinnelli's iScroll-4 and it works in iOS safari as well. It has three methods scrollTo, scrollToElement and scrollToPage. Let's say you have an unordered list of elements wrapped inside a div. As Robert Koritnik has written above, you need to have that slight animation to show that you have scrolled. The below method achieves that effect.
scrollToElement(element, time);

read please about scrollIntoViewIfNeeded
if(el.scrollIntoViewIfNeeded){
el.scrollIntoViewIfNeeded()
}else{
el.scrollIntoView()
}

You can use jQuery alternative and animate <html> and <body> elements:
$('html, body').animate({
scrollTop: $("#myElem").offset().top
}, 1000);

Have not tried this, but seems like piggybacking on built in scrollIntoView function would save much code. Here is what I would do if you want animated action:
Cache current scroll position of the container as START POSITION
run built in scrollIntoView
Cache the scroll position again as the END POSITION
Return container back to START POSITION
Animate scrolling to END POSITION

Css solved it guys!!
I picked the target id with #idSelected and styled it with css "scroll-margin-top" and defined my margin top in rems (use what ever measurement that suits you).
#idSelected {
scroll-margin-top: 10rem;
}