[Histonet] semiquantitative scoring system

[Histology]

Does anyone out in histoland know semiquantitative scoring system (ER & PR)? If so could you please share with me this procedure.  Thanks for the help....
Muhammad Tahseen 
Histology Supervisor
 Deptt. Pathology
Shaukat Khanum Cancer Hospital
And Research Center Lahore. Pakistan
Ph.   +92 42 5180725-36 Ext 2369,
Fax. +92 42  5180723
e-mail. Histology <@t> skm.org.pk