  Let $E$ be an elliptic curve over $\mathbb{Q}$ with good supersingular
reduction at a prime $p\geq 3$ and $a_p=0$. We generalise the definition of
Kobayashi's plus/minus Selmer groups over $\mathbb{Q}(\mu_{p^\infty})$ to
$p$-adic Lie extensions $K_\infty$ of $\mathbb{Q}$ containing
$\mathbb{Q}(\mu_{p^\infty})$, using the theory of $(\phi,\Gamma)$-modules and
Berger's comparison isomorphisms. We show that these Selmer groups can be
equally described using the "jumping conditions" of Kobayashi via the theory of
overconvergent power series. Moreover, we show that such an approach gives the
usual Selmer groups in the ordinary case.
