QUOTE(earthshaker @ Jan 8 2009, 01:02 AM)

I guess my main question is /was, if you put an image on a page, it will be x pixels from the edge of the page, but what part of it, is referenced, the center, the left edge, the top left corner. the right edge? which is most common?
What did you use to place it x pixels from the edge? As said, 'position: relative' doesn't do that. If you used 'position: absolute' the offset is explained just below the section I linked to. It's edge to edge.
'top'
This property specifies how far a box's top content edge is offset below the top edge of the box's containing block.
'right'
This property specifies how far a box's right content edge is offset to the left of the right edge of the box's containing block.
'bottom'
This property specifies how far a box's bottom content edge is offset above the bottom of the box's containing block.
'left'
This property specifies how far a box's bottom content edge is offset above the bottom of the box's containing block.