Absolute Positioned Image Zoom Not Working Properly

I am trying to zoom a image which is inside a div. When page is loaded i am showing 300*300 size image inside a 400*400 size div. So, to show the image at the center of the div i

Solution 1:

Can you try this;

HTML

<divclass="outer"><divclass="inner"><imgid="img1"src="http://siliconangle.com/files/2012/04/HTML5_Wallpaper_1680x1050.png" /></div></div><buttonclass="zoomout"data-zoom="out">Zoom Out</button > 
<buttonclass="zoomin"data-zoom="in">Zoom In</button >

CSS

.outer{
    height:400px;
    width:400px;
    overflow:auto;
    border:1px solid black;
    float:left;
    margin:30px;
    text-align:center;
}

.inner {
    height:400px;
    width:400px;
    display:table-cell;
    vertical-align:middle;
}

img {
    width:300px;
    height:300px;
}

http://jsfiddle.net/L4qdL/7/