Assuming that you want to pass three variables, $id, $subid, and $pos, you have almost got it.
The query string is indicated by the "question mark", and additional values in the query string must be seperated with an "ampersand", e.g.:
<a href="test.php?id=n&subid=n2&pos=n3"> </a>
The variables are then referenced in the receiving script "test.php" as follows:
// print the passed variables....
echo "the variables are: id, $id, subid, $subid, and $pos is the pos variable";
But then, you probably knew that already, didn't ya?? Welcome to PHPBuilder!!