Rounding a Number variable in javascript

I have this code:

function sellByte() {
if (player.bytes >= 1) {
    player.bytes = player.bytes - 1;
    player.money = player.money + 0.10;
    document.getElementById("bytes").innerHTML = "Bytes: " + player.bytes;
    document.getElementById("money").innerHTML = "$" + player.money;
   }
}

And whenever I sell a Byte my money value ends up looking like $10.00000003 or something along those lines, how would I go about rounding the money value UP every time this function is run?