Working with save names

Using the example from docs, I can set a var as a save file name, like:

(save-game: $playerName)

Ok. But let's say my save is:

(save-game:"Slot A", $playerName +","+ $day + "days , LVL " + $playerLevel)

...where vars are obviously a day (from my calendar system), and player level.

Using:

(if: (savedgames:) contains "Slot A")[(print: (saved-games:)'s "Slot A")]

...it could result in "Slot A, John, 15 days, LVL 10".

Any chance to break this with Javascript or something? So I can maybe build a table and offer load options in a more friendly way like:

<table>
  <tr>
    <th>Slot</th>
    <th>Name</th>
    <th>Days</th>
    <th>Level</th>
  </tr>
  <tr>
    <td>A</td>
    <td>John</td>
    <td>15</td>
    <td>101</td>
  </tr>
  <tr>
    <td>B</td>
    <td>Mary</td>
    <td>250</td>
    <td>1250</td>
  </tr>
</table>

The table is just an idea. The main point is: how to break the save name in parts?