WAF and select menu

[silver18]

Good afternoon!!!!

I'm fighting with the development of a WAF.

I get the "Unable to start application error" everytime I use one of two select menus (http://www.w3schools.com/tags/tag_select.asp).

This is the problem:

- I hit one of the select's option
- it runs a javascript
- I get the error

Here's the strange: if I place an alert box right at the end of all the operations, everything works fine! So it works like:

- I hit one of the select option
- it runs a javascript
- i get the alert box
- by hitting OK, it continue working fine

Any clue? It seems like it's a Kindle problem, not a WAF problem....

[JustAMan]

Try inspecting Kindle logs first... most useful is run "showlog -f" and then try to do problematic actions. That way you'll see only fresh portion of the log.

[silver18]

Here are two logs, first with crash, second with the alert box and, then, no crash!
I can see the select's option being choosed, than a remove_dead_app command...
Really can't understand why it doesn't work here and why it works if I place an alert box!

[silver18]

I changed everything but the problem is still there!
Now the app is really lighter than before, but it crashes anyway!

It seems to be a problem related to how the Kindle manages the select menu (in fact it's a menu, not a dropdown!!).

[silver18]

Here's how I solved the problem...Not elegant at all, but it works..
(actually a part of my ImageGallery WAF)

<form>
<select id="jumpToBook" name="selectedBookmark" onchange="jumpToBookmark(this.form.selectedBookmark);" style="position: fixed; left:20px; top:113px; z-index: 2;">
<option style="display:none;" value="" disabled="disabled">No bookmarks available!</option>
</select>
</form>

and here's the relevant part of the jumpToBookmark function:

var selpage;
var wheretobook;

function jumpToBookmark (wheretobook) {
selpage = wheretobook.options[wheretobook.selectedIndex].value;
}

I found that 5.1.0 firmware has lots of problems with select menus' style: so avoid fixed width and be careful with z-index (selects like to stay on top!).