When the statement that follows is executed, a message is displayed if the value in userEntry

if $(!$isNaN$($userEntry$)||$ userEntry $<=0)\{$

alert $("$Message$")$;

$\}$

When the statement that follows is executed, a message is displayed if the value in userEntry

if $(!$isNaN$($userEntry$)||$ userEntry $<=0)\{$

alert $("$Message$")$;

$\}$

is a number and the value in userEntry is less than or equal to zero

is a number or the value in userEntry is less than or equal to zero

isn$$t a number or the value in userEntry is less than or equal to zero

isn$$t a number and the value in userEntry is less than or equal to zero