Reported by wdmartin on 2011-01-25 23:23
In Firefox 3.6.13 and NVDA 2010.2, NVDA will only read alerts aloud if they consist of a string that does not contain HTML. I have built a minimal test case:

http://www.libsys.und.edu/dev/ill/ldap/nvda-test.html

I will also upload a copy of the test case.

The are four ways to update the contents of the alert:

Test 1) Using innerHTML with a plain text string

Test 2) Using innerHTML with a string containing HTML

Test 3) Using the W3C DOM methods to manually create/insert HTML

Test 4) Using the W3C DOM methods to manually insert a plain string

Test 1 is read as "This is test 1 alert This is test 1"

Test 2 is read as "alert"

Test 3 is read as "alert"

Test 4 is read as "This is test 4 alert This is test 4"

This works fine if all you want is an audible message. But if you want a message which is both audible and visible, it makes things more complicated.