to make a batch file just right click on your desktop and create a new text file.
find the path where your development CSS or JS file resides
C:\Users\Administrator\Documents\Visual Studio 2010\Projects\Sharepoint Console\Mobile.MasterPage\Layouts\Mobile.MasterPage
then find where it deploys to in the hive 14 folder
C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\Mobile.MasterPage\
using the command xcopy with a switch /y you should end up with
xcopy "C:\Users\Administrator\Documents\Visual Studio 2010\Projects\Sharepoint Console\Mobile.MasterPage\Layouts\Mobile.MasterPage" "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\Mobile.MasterPage\" /y
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-qBwMwqOlLJkiRmW9hz35PVVdou8mfzSZWze8HCN4VAplS_2UoKvrclRn3kR5rHVCza9wwgwQ8g-LZmCCm3UX39bDFNdIbEmQz2yvFkyGFLdGsKRNPQcfJ4tzMr6F_VkKeRLuvK5uJ1k/s1600/batch.png)
now when you run your batch file it should copy everything from one directory to the other overwriting the changes, and hence saving you the bother of deploying your solution to see simple client side scripting and branding changes.
make sure to hold ctrl + f + f5 in firefox when you refresh your page to grab the latest CSS and JS files