#container { background: url(images/bg.jpg) no-repeat center center fixed; -webkit-background-size: cover; /* For WebKit*/ -moz-background-size: cover; /* Mozilla*/ -o-background-size: cover; /* Opera*/ background-size: cover; /* Generic*/ }
other variation:
#container{ background: url('background.png') no-repeat; background-size: 100%; }