FETCHING THE NAMES OF ALL THE PARAMETERS PASSED TO YOUR SCRIPT:

            @names = $query->param

       If the script was invoked with a parameter list (e.g.
       "name1=value1&name2=value2&name3=value3"), the param() method will
       return the parameter names as a list.  If the script was invoked as an
       <ISINDEX> script and contains a string without ampersands (e.g.
       "value1+value2+value3") , there will be a single parameter named "key-
       words" containing the "+"-delimited keywords.