Is there any difference between
jQuery(\'#id\').show() and jQuery(\'#id\').css(\"display\",\"block\")
and
jQuery(\'#id\').
You can have a look at the source code (here it is v1.7.2).
Except for the animation that we can set, this also keep in memory the old display style (which is not in all cases block, it can also be inline, table-cell, ...).
block
inline
table-cell