back button

[Anon]

hello,how can i detect a user press the back button of the browser.is it possible?

[Anon]

No, because it is possible that a browser gets the previous page
directly from it's own cache or a proxy, without accessing your webserver at all.

[Anon]

I have created some online javascript client side tests using coursebuilder and dreamweaver. I am also using php to collect the answers and post them to MySQL.

After the students take the test I would like them to be redirected to the answers. However once they enter the answer page I want to disable the test url for their username and password so they can't press the back button and put in all of the correct answers and update the database.

They get to take the test once and then thats it. No way back into the test page for their username.

Thanks

-Justin

[Anon]

This seems pretty simple to me - just have a relations table like this:

create table student_test_realtions(
studentID [defs here],
testID [defs here],
KEY (studentID),
KEY (testID)
);

Then they go to test #1 and they answer all of the questions and hit submit you put an entry into this table with the test ID and studenID who took it. Then at the VERY beginning of the main test page you do a check (since the user - I presume - has to be logged in)

"SELECT * FROM student_test_relations WHERE studentID='$studentID' AND testID='$testID'"

Then if mysql_num_rows($result) > 0 don't let them take the test.

--Joe
http://www.miester.org