Background image either side of webpage

Not a person

I am looking to have a background image to fill the voids created on larger displays on either side of the webpage.

I have now successfully centered the page but want to have an image in the voids.

Like this site http://www.skysports.com/football

My style sheet code goes like this: (have corresponding div tags in the HTML)

@charset "utf-8";
#wrapper {
	float: left;
	height: auto;
	width: 960px;
	background-image: url(Resources/Images/lgrey162.jpg);
	margin-right: auto;
	margin-left: auto;
	position: relative;
}
#container {
	width: 960px;
	margin-right: auto;
	margin-left: auto;
}

#header {
	float: left;
	height: auto;
	width: 960px;
	margin-bottom: 10px;
	background-image: url(Resources/Images/lgrey011.jpg);
}
#mainwrapper {
	float: left;
	height: auto;
	width: 960px;
	margin-right: auto;
	margin-left: auto;
}

#navbar {
	float: left;
	height: auto;
	width: 90px;
	margin-right: 10px;
	padding-left: 10px;
	background-image: url(Resources/Images/lgrey011.jpg);
}
#triwrapper {
	float: left;
	height: auto;
	width: 680px;
}

#mainarea {
	float: left;
	height: auto;
	width: 680px;
	margin-right: 5px;
	margin-left: 0px;
	background-image: url(Resources/Images/lgrey008.jpg);
	margin-bottom: 10px;
	color: #000000;
}

.prodbox {
	float: left;
	height: auto;
	width: 330px;
	margin-right: 5px;
	margin-left: 5px;
	margin-bottom: 10px;
	background-image: url(Resources/Images/lgrey008.jpg);
}
#adbar {
	float: right;
	height: auto;
	width: 150px;
	margin-left: 10px;
	padding-bottom: 5px;
	background-image: url(Resources/Images/lgrey011.jpg);
}
.footerbox {
	background-color: #0F0;
	float: left;
	height: auto;
	width: 480px;
}
.adbox {
	background-color: #FF0;
	float: left;
	height: auto;
	width: 140px;
	margin-left: 5px;
	margin-top: 5px;
}
.imagecaption {
	color: #000000;
	font-size: 11px;
}

Any ideas ? Thanks. Novice Student Here

tricky D

You want it outside the wrapper, ie. in the body

body {
background-image: url(Resources/Images/bigbackground.jpg);
}

cormee

CSS3 allows for multiple background images, so you could consider that option.