body { color: black; background: #000 no-repeat; }

body#stuBody{
	background: #000000 url(images/stu/fond_stu.jpg) no-repeat;
}
body#envBody{
	background: #000000 url(images/env/fond_env.jpg) no-repeat;
}
body#pluBody{
	background: #000000 url(images/plus/fond_plus.jpg) no-repeat;
}