[Zope] how to retrieve variables & values from the URL

[jacintha menezes]

Hi,
   In lookup query when i give the input as Emp_no & submit it , following
url
comes in the browser address space.

http://192.168.222.217:8080/project/Admin/looktool_report?Emp_no=4&SUBMIT=Su
bmit+Query

 how can i retrieve the variables & values from the URL using dtml tags

                                       Thanks,
                                        bye,
                                         jacinth