Display jquery implementation elements and hidden in several ways

.. 1 $ ( "# account -table tr") find ($ ( "# tcNum")) show ();. // show display, hide () hides 
　or like this 
　$ ( '# account-table tr ') .find. ( 'td: eq (column number)') Show (); 
. 2 $ ( "#tcNum") .toggle (): // this method is hidden between the reality of the switch 
. 3 $ ( "# tcNum ".) css ( 'display ', 'none'); // display the hidden attribute is none, then the block is shown as 
4 $ (." # tcNum " ) css ( 'visibility', 'hidden').; // vissibility attribute value hidden hidden for visible if significantShows 

the third and fourth methods can make element hiding, no difference in visual effects above, there are some differences on operating dom 
display: none to make objects disappear on the page 
visiility: hidden elements that make hidden on the page, but there is some space ---- visibility attribute specifies the element is visible