• background-color:
• background-image:
• background-repeat:
• background-attachment: scroll|fixed|local|initial|inherit;
• background-position: horiz vert either in px or %, else center or one of: left top,left center, left bottom, right top, right center, right bottom, center top, center center or center bottom. If you only specify one keyword, the other value will be "center".

Additional CSS3 properties are:

• background-size:
• background-origin
• background-style
• background-clip

Background: #f84c9f url(http://images.vrx.palo-alto.ca.us/vrx/strips/nvrx4.png) no-repeat fixed 50% 80%;

Is equivalent to:

Background-color: #efffff;
Background-image: url(http://images.vrx.palo-alto.ca.us/vrx/strips/nvrx4.png);
Background-repeat: no-repeat
Background-attachment: fixed;
Background-position: 50% 80%;