How to display Devanagari fonts in your browser
The Browser can show Hindi fonts. How you enable it, depends on the version of windows you are running.
On Windows XP
Go to Start > Control Panel.
If you are in "Category View" select the icon that says "Date, Time, Language and Regional Options" and then select "Regional and Language Options".
If you are in Classic View select the icon that says "Regional and Language Options".
Select the "Languages" tab and make sure you select the option saying "Install files for complex script and right-to-left languages (including Thai)". A confirmation message should now appear - press "OK" on this confirmation message.
Allow the OS to install necessary files from the Windows XP CD and then reboot if prompted.
For more details please see this :