Full Width - Normal Height BG Img

Full Width - Normal Height BG Img

So I have been over and over all the pages on google looking for some code
that will help me fix my stretch width background image. I'm looking to
make my background image fit all browser resolutions width, the height
must remain the height it is on the image.
So far my code has given me a full width background but didn't stretch the
image so its full width but the image didn't budge.
body{
background-color:#575c70;
background: url('http://i.imgur.com/1MS4u4y.jpg');
height: auto;
width: 100%;
left: 0;
background-repeat: no-repeat;
position: absolute;
}