if ( $a == "login" )
{
$templatefile = "login";
....etc
}
...
outputClientArea( $templatefile, $nowrapper );
# outputClientArea function will display
"./templates/orderforms/cart/{$templatefile}.tpl"
Details :
---------
if variable "$a" has a true value .. will set "$templatefile" value by
default
but when "$a" value didn't match the defaults values
you can control "$templatefile" and use it as ( File Disclosure )