On Jul 13, 2012, at 9:04 PM, Philippe Wittenbergh wrote: > Indeed it is what I thought...When the parent element (#header in your case) > has no border and no padding, the top/bottom margins of the child block-level > element merge with the margins of the parent block and/or or the top/bottom > margins of the preceding/subsequent block-level element. Borders and padding > (-top/-bottom) prevent those margins form protruding outside of that div. > > The whole mechanism is described here: > http://www.w3.org/TR/CSS21/box.html#collapsing-margins
thank you, Philippe! John ______________________________________________________________________ css-discuss [[email protected]] http://www.css-discuss.org/mailman/listinfo/css-d List wiki/FAQ -- http://css-discuss.incutio.com/ List policies -- http://css-discuss.org/policies.html Supported by evolt.org -- http://www.evolt.org/help_support_evolt/
