I am trying to run a javascript only on mobile phone using Foundation and Rails, (and haml, this is haml example, but don't pay attention to that).

I am doing something like this:

```
.row
 =# something for large screens
    .row.show-for-small-only
      .small-10.small-centered.columns
        = javascript_tag "$('.someClassIPointTo').myfunction();"

```

So I am trying to run this javascript only for small size screens, and NOT for large screens. Is there a way for doing that other then duplicating the code?