#site_content_background{
	z-index:1;
	width:785px;
	height:500px;
	background:url(../img/site_content_background.gif) no-repeat center top;
	margin:0 auto;
	padding:8px 0 0 0; 
}
#site_content {
	z-index:2;
	width:760px;
	margin:0 auto;
	padding:0; 
}
#header{
	width:760px;

}
#main_body{
	float:left;
	width:760px;
	margin:20px auto;
}
#body_left {
	float:left;
	width:175px;
}
#body_centre {
	float:left;
	width:370px;
}
#body_right {
	float:left;
	width:200px;
}
#footer {
	float:left;
	width:760px;
	background-image:url(../img/footer_background.gif);
}

#body_double {
	float:left;
	width:495px;
}

#body_centre_and_right {
	float:left;
	width:565px;
}