In the first set of markup, a paragraph immediately follows anH2, so it is silver. In the second, the elementadjacent to the H2 is a UL,which does not match the rule, and neither does the paragraph rightafter that. Finally, even though there is text directly after the down. It's also worth noting what happens if you only supplyone value. In that case, the single value supplied is taken to be thehorizontal value, and the vertical is assumed to be 50%. This isbasically the same as with the keywords, where if only one keyword isgiven, the other is assumed to be center. Thus:

BODY {background-image: url(bigyinyang.gif);background-repeat: no-repeat;background-position: 33%;}

The background image is placed one-third of the way across the page, list item. The second list shows what would happen if the user agentdidn't collapse margins, resulting in 25-pixel spaces betweenlist items.