using $_SESSION to query table

i have a spry menu that has 2 levels.

level 1 has a title of "1960's", "1970's", ext all the way to "2000's"

the second level has the years 1961,1962,1963, ext.

in a table i have all the football scores of my high school.  each line  has the year in it.  1963, town, score, opponent, score

when the user chooses a year, i want it to populate my data set with the year that user chooses.

this is a line from the spry menu.

<li><?php session_id(); $HTTP_SESSION_VARS["yearp"]=1980; ?><a href="all scores.php">1980</a></li>
<li><?php session_id(); $HTTP_SESSION_VARS["yearp"]= 1981;?><a href="all scores.php">1981</a></li>

"all scores.php" is the page that will display the results.

if the user chooses 1980, the results appear from 1981,  which is the last one.  if i were to add another line that had 1982, it would display 1982 scores.

i need it to keep the varable "yearp" value the user chooses and then display that year.

i'm new to this so please bare with me.

any ideas?

Larry