@echo off

if (%1)==() (
   cd
   goto Exit
)

if (%1)==(/?) goto Usage
if not (%2)==() goto Usage


for %%p in (%1) do (
   %%~dp
   cd "%%~fp"
)


goto Exit

:Usage
echo usage: %0 [ {rel_path} / {abs_path} ]
echo.
echo    Switches to current drive and the current dir to those
echo    of the supplied path.
echo.
echo    If no argument is supplied, displays the current dir.

:Exit

##</code><code>##

mycd d:\

##</code><code>##

mycd "C:\Program Files"

##</code><code>##

# Start a shell in d:\
cmd /k mycd d:\

##</code><code>##

# Start a command in d:\
cmd /c mycd d:\ & mycommand args