CSS Display vs Visibility

display: none;
display: block;
display: inline;

VS

visibility: visible;
visibility: hidden;

Unlike display:none;, with visibility: hidden; objects that are not visible still reserve the same physical space in the content layout as they would if they were visible.

References
display Property (A, ABBR, ACRONYM, ...)
http://msdn.microsoft.com/en-us/library/ms530751(VS.85).aspx

visibility Property (A, ADDRESS, APPLET, ...)
http://msdn.microsoft.com/en-us/library/ms531180(VS.85).aspx