[Tugindia] Help: Different styles of horizontal and vertical lines in Tabular or array environment.

[Ganesh Sharma]

Dear Friends,

Please inform me how I should draw horizontal and vertical lines of
different patterns/styles and thickness instead of default
style/thickness in Tabular or array environment. 

E.g.

=====================================
|   ai   |   bi   .   ci   "   di  ||
=====================================
|   a1   |   b1   .   c1   "   d1  ||
|   a2   |   b2   .   c2   "   d2  ||
|   a3   |   b3   .   c3   "   d3  ||
-------------------------------------

Thanking you in anticipation.

G. Sharma