[рони]

Alexander Belov,

function x(a, b) {
    return a.length == b.length && (new RegExp(a.split("").reduce(function(a, b) {
        return a + "(?=.*" + b + ")"
    }, ""))).test(b)
};
       alert(x("Iowa","oIaw"));
       alert(x("Iowa","aIow"));
       alert(x("Iowa","stateIowa"));
       alert(x("Iowa","Io wa"));