jquery if variable in a list of values

I have some jquery checking the choice made in a drop down.

function toggleFields() {
if ($("#chosenmove1").val() == 4)
    $("#hideme").show();
else

    $("#hideme").hide();
}

This works fine but I would like to change it so it checks a list of values like

if ($("#chosenmove1").val() in (3,4,5))

How can I write this to make it work (the above doesn't)

Tried a bit more

var arr = [3,4,5];
var value = $("#chosenmove1").val();
alert(value);

if ($.inArray(value, arr) > -1)
    $("#hideme").show();
else

    $("#hideme").hide();

}

The alert box tells me var value is getting the right value from the drop down - yet the show hide wont work under this setup.
IF I replace var value = $("#chosenmove1").val(); with
var value = 3; then it does work?