setting a global var so that all pages can see var

Hello again guys, thanks for the help over the past 48 hours :) Over the past week i have had the job of tweaking the php pages of a friends site. so far so good :) Now i am onto the admin area for running the website. I downloaded one of the many db managers scripts from www.hotscripts.com Luckly its a very simple app, easy to mod. Anyways most of my php knowledge is in conjuction with flash www.innovativedesigns.org.uk. most of the problems i have had here have been fairly simple to learn and fix. Now the job this week is with php+html (total newbie to this area). most of the problems i have been able to fix with some help from here as well. http://thor.ancilenetworks.co.uk/~pferrie/vinrev/adm/myadmin.html ~This is the admin area. I manged to get the drop down menu working to select the revelent table and then set $tablename with the result being displayed in the next page as: <? print "MyAdmin database for <i>$tablename</i> table"; ?> The new page has 4 links to load other php files to edit,delete, view, and add new data to the DB On the links have: <a href="edit.php?tablename=$tablename">View database</a><br> ~Now in the edit.php i have : $result = mysql_query("SELECT * FROM $tablename")or die("couldnt select table"); $tablename is not being passed with the link. What am i missing? Cheers Paul