Making a style, how do you set the button location in navbar

[CnB]

i am making a style but i cant figure out how i set the button locations.
i first edited a style with my graphics, added some buttons changed some.
but i cant figure out in the header template where they got the location set.

like this

PHP Code:

          <td width="65" height="25" align="left" valign="top"><a href="register.php?$session[sessionurl]"><img src="$stylevar[imgdir_misc]/nav_reg.gif" alt="" width="65" height="25" border="0" /></a></td> 


is the 65 the location where it will be placed ? or maybe the width from the left side to the button start ?