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(The following is summarized from the jsMath website. For more detailed information, visit Information for jsMath Users.)

For most browsers, jsMath should just work, without having to install or configure anything extra. However, the math will look better and load faster if you first install the TeX fonts. To do so, follow the directions below that correspond to your operating system.

PC Users:

1. Download the fonts here and extract the folder "TeX-fonts-25" onto your desktop (or some other place you can remember).
   
   
2. Open the Control Panel from the Start menu and switch to Classic View by clicking the button in the left panel.
   
   
3. Double-click the "Fonts" icon.
   
   
4. If you are using Windows XP, choose File -> Install New Font. If you are using Windows Vista, right-click on an empty space in the Fonts window and choose Install New Font. (In both operating systems this will bring up the same window.)
   
   
5. Use the folder hierarchy at the bottom to navigate to your "TeX-fonts-25" folder. (If you extracted it to your desktop, this will be under C:\ -> Documents and Settings -> [Your User Name] -> Desktop -> TeX-fonts-25)
   
   
6. Click Select All, and make sure that the "Copy fonts to Fonts folder" option at the bottom of the window is checked.
   
   
7. Finally, click OK. The fonts will be installed.
   
   
8. Restart your internet browser to make sure that it notices the new fonts. jsMath will now use those TeX fonts to better display mathematics. You may also delete the "TeX-fonts-25" folder if you wish, as it is no longer needed.

Mac OS X Users:

1. Download the fonts here and extract the folder "TeX-fonts-10" onto your desktop.
   
   
2. Open Font Book by double-clicking the icon in your "Applications" folder.
   
   
3. Click the gear in the upper left and select the "Add fonts" option.
   
   
4. Navigate to your desktop and double-click on the "TeX-fonts-10" folder. Font Book should then install all of the fonts in that folder.
   
   
5. Restart your internet browser to make sure that it notices the new fonts. jsMath will now use those TeX fonts to better display mathematics. You may also delete the "TeX-fonts-10" folder if you wish, as it is no longer needed.

Linux/Unix Users:

1. Download the fonts here and extract the folder "TeX-fonts-10" to your home directory.
   
   
2. Open a terminal. If you do not have a ".fonts" directory (you can check by typing "ls -a ~" without the quotes), create one by typing "mkdir ~/.fonts".
   
   
3. Copy all of the fonts into the ".fonts" directory by typing "cp -v ~/TeX-fonts-10/* ~/.fonts".
   
   
4. Restart your internet browser to make sure that it notices the new fonts. jsMath will now use those TeX fonts to better display mathematics. You may also delete the "TeX-fonts-10" folder if you wish, as it is no longer needed.

Troubleshooting

In order to display math, jsMath does require JavaScript, Cascading Style Sheets (CSS), and unicode fonts to be enabled. Most modern supported browsers have these enabled by default. If the tutorials do not display correctly, however, make sure that these are enabled.

Opera users: A jsMath bug has been noted in which mathematics will seem to spill into the margins, and not display correctly. The cause is unknown, but if you encounter this issue try changing the font size (this can be done with Control+ and Control-) until the math is readable.