Slide div to the top of the screen

Question

I am trying to get a div to slide to the top of the screen when someone press enter in a input field. The issue I am having is that instead of the div moving 50px from the top of the screen it moves 50px from the top of the div it is in.

http://jsfiddle.net/rtxu2/

Here is the real code:

The HTML

<div class="home-nav">
    <div style="display: none;position: absolute;margin-top: -1px" id="search-box">
        <form action="/" method="get"><input type="text" name="q" class="q" /></form>
    </div>
</div>

The JavaScript

    $(".q").keydown(function(e){
        if(e.keyCode == 13){
            var val = $(this).val();
            window.location = "#q="+val;
            $(".space").animate({
                width: "100px"
            }, "slow");
            $("#search-box").animate({
                top: "50px"
            }, "slow");
            return false;
        }
    });

The CSS

div.home-nav{
    line-height: 4em;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 300px;
    height: 300px;
    margin: auto;
}

The reason I have the inner div positioned absolute, is because when you click on the link The div/input will cover the link for a little effect.

Answer 1

Okay, I got it! What I did, was remove the element from the div and place it in the body when someone presses enter. I then go and do the animation. If anyone has a better way please post!

    $(".q").keydown(function(e){
        if(e.keyCode == 13){
            var val = $(this).val();
            var item = $(this).closest("#search-box");
            var left = item.offset().left;
            var top = item.offset().top;

            $(this).closest("#search-box").remove();
            item.css({
                top: top + "px",
                left: left + "px",
                zIndex: 100
            })
            $("body").prepend(item);

            window.location = "#q="+val;
            $(".space").animate({
                width: "100px"
            }, "slow");
            item.animate({
                top: "35px"
            }, "slow");
            return false;
        }
    });

Answer 2

If you don't want .sub to be positioned relative to .main upon animation, don't put it inside .main in the HTML.

http://jsfiddle.net/rtxu2/10/

<div class="main"></div>
<div class="sub">
    <form>
        <input type="text" />
    </form>
</div>

Answer 3

try setting the div to fixed if you want it to be placed relative to the top of your screen, rather than the div it's positioned inside.

div.home-nav{
    line-height: 4em;
    position: fixed;
    top: 0;
    left: 300px;
    height: 300px;
    margin: auto;
}