Cannot arrange layout with z-index

Cannot arrange layout with z-index

HTML
<div id='divTop'>divTop<br>divTop<br>divtop</div>
<div id='btnHome'>Home</div>
<div id="player">player<br>player<br>player</div>
CSS
body{
position:relative;
max-width:1024px;
height:100%;
margin:0 auto;
font-family: "Trebuchet MS", sans-serif;
text-align:center;
}
#divTop{
display:none;
position:relative;
z-index:5;
text-align:center;
background:#008080;
border-bottom:medium ridge #D10000;
}
#btnHome{
cursor:pointer;
position:absolute;
top:1.5vh;
left:1vw;
max-width:3.4vw;
z-index:6;
}
#player{
display:none;
position:relative;
z-index:3;
max-width:95vmin;
max-height:95vmin;
border:medium ridge #ffffff;
border-radius:9px;
}
JS
y = $(window).innerHeight() - $('#player').height();
$('#player').css ('margin-top', y/2);
$('#player').show();
$("#btnHome").click(function() {
$('#divTop').slideToggle('slow');
});
Why is btnHome inside player. It should be fixed on top-left of page ?
Clicking on btnHome why is player pushed down ? It should be also fixed. I
just want to show-hide divTop by overlapping everything bellow.
fiddle is here