Voting Poll Modifications - help!

In the article "Creating a Voting Poll With PHP And MySQL 2/2" the person visiting the site containing the voting poll sees the "most recently added poll" using the ShowPoll function:

$strQuery = "SELECT * FROM pollQuestions ";
$strQuery .= "ORDER BY pk_Id DESC LIMIT 1";

$pResult = mysql_query($strQuery);


How do I cause the viewer to see the polls in sequential order each time they visit the page, instead?

For instance:
'Bob' visits the page on Monday morning and sees Poll Id 1
'Bob' visits the page on Monday afternoon and sees Poll Id 2
'Bob' visits the page on Tuesday and sees Poll Id 3
'Bob' visits the page on Friday morning and sees Poll Id 4

Thanks. I am new to PHP and MySql.

The easiest way would be to set a cookie. In fact, I can't think if a way to do it without one. I would set a cookie with the "last" poll they saw and next time you'll know and can show the next one.