To type in Marathi on any website, blog and facebook you just need to install a software named Google IME (Input Method Editor) tool with the help of this tool you can (More than 22 languages as well ) at anywhere on webpages, blogs, facebook etc. Here are the steps how to download and use Google IME tool.
Step 1: Download Google IME tool form here.
Step 2: Select the Marathi language you want to install and download the IME Tool on your system then run inputtoolsetup.exe file on your system it will install automatically.
Step 3: Install Google IME tool on your system.
Step 4: Now when you want type in Marathi just press Alt+Shift Key then you will find a language bar tool at right bottom side on start bar now select your typing language. (If you have installed it on Windows XP then you have install Marathi langugae pack then you will be able to use this software, How to install Marathi langauge pack)
Step 5: Now what you type will appear in Marathi. (If you don't know Marathi typing then no problem this tool provide on screen keyboard, so you can type with on screen keyboard also)
Step 6: If you want again to type in English then again press Alt+Shift key.