LocalStorage DB and foreign key constraints

LocalStorage DB and foreign key constraints

I'm developing a web-app that uses the built in localStorage SQL DB in Opera 10.53, as specified in HTML5. When i try to use constraints in the tables, it won't work.

I define 2 test tables:

CREATE TABLE `TEST1` (
`ID` INTEGER PRIMARY KEY AUTOINCREMENT
,`TEST1_TEXT` TEXT NOT NULL
)
CREATE TABLE `TEST2` (
`ID` INTEGER PRIMARY KEY AUTOINCREMENT
,`TEST1_ID` INTEGER
,`TEST2_TEXT` TEXT NOT NULL
, FOREIGN KEY (`TEST1_ID`) REFERENCES `TEST1`(`ID`) ON DELETE CASCADE ON UPDATE CASCADE
)

I insert some data into TEST1:
INSERT INTO TEST1 (TEST1_TEXT) VALUES ('test1')
INSERT INTO TEST1 (TEST1_TEXT) VALUES ('test2')

Then insert some data into TEST2:
INSERT INTO TEST2 (TEST1_ID,TEST2_TEXT) VALUES (1,'text1')
INSERT INTO TEST2 (TEST1_ID,TEST2_TEXT) VALUES (2,'text2')

The tables then contains:
ID : TEST1_TEXT
===============
1 : test1
2 : test2

ID : TEST1_ID : TEST2_TEXT
==========================
1 : 1 : test1
2 : 2 : test2

So far so good. But when i try to insert this:
INSERT INTO TEST2 (TEST1_ID,TEST2_TEXT) VALUES (99,'test3')

I get no errors, it happily inserts this row.

If i then try to delete something from table TEST1
DELETE FROM TABLE1 WHERE ID = 1

The line from TEST1 is deleted but the line in TEST2 pointing to TEST1 is not deleted.
The two tables look like this:

ID : TEST1_TEXT
===============
2 : test2

ID : TEST1_ID : TEST2_TEXT
==========================
1 : 1 : test1
2 : 2 : test2
3 : 99 : test3

According to http://www.sqlite.org/foreignkeys.html
"Foreign key constraints are disabled by default"
If that is so in Opera 10.53, how do i enable it?
If i try the command suggested at the mentioned web page, i get an error.

PRAGMA foreign_keys = ON
Error #5 : not authorized

I tried to search dev.opera.com for info about this but found nothing.
Can someone please help!