fixed batch variable handling

bin/j.bat

@@ -1,15 +1,21 @@
 @echo off
+setlocal EnableDelayedExpansion
 
 echo %*|>nul findstr /rx \-.*
 if ERRORLEVEL 1 (
-  for /f %%G in ('python %~dp0\autojump %*') do set new_path=%%G
+  for /f %%i in ('python %~dp0\autojump %*') do set new_path=%%i
-  if exist %new_path%/nul (
+  if exist !new_path!\nul (
-    cd %new_path%
+    echo !new_path!
+	pushd !new_path!
+	REM endlocal is necessary so that we can change directory for outside of this script
+	REM but will automatically popd. We mush pushd twice to work around this. 
+	pushd !new_path!
+	endlocal
+	popd
   ) else (
     echo autojump: directory %* not found
     echo try `autojump --help` for more information
   )
-  echo %new_path%
 ) else (
   python %~dp0\autojump %* 
 )

bin/jo.bat

@@ -1,15 +1,15 @@
 @echo off
+setlocal EnableDelayedExpansion
 
 echo %*|>nul findstr /rx \-.*
 if ERRORLEVEL 1 (
-  for /f %%G in ('python %~dp0\autojump %*') do set new_path=%%G
+  for /f %%i in ('python %~dp0\autojump %*') do set new_path=%%i
-  if exist %new_path%/nul (
+  if exist !new_path!\nul (
-    start %new_path%
+    start !new_path!
   ) else (
     echo autojump: directory %* not found
     echo try `autojump --help` for more information
   )
-  echo %new_path%
 ) else (
   python %~dp0\autojump %* 
 )