Conversion from jsMath to MathJax is easy: If you are using jsMath/easy/load.js with tex2math: Simply replace it with MathJax/MathJax.js?config=default Configure MathJax/config/default.js appropriately If you are loading jsMath.js directly: Replace <SPAN CLASS="math"> with <script type="math/tex"> Replace <DIV CLASS="math"> with <script type="math/tex; mode=display"> (There is a jsMath2jax extension that will do this on the fly.) No need for jsMath.Process() or jsMath.ProcessBeforeShowing() or jsMath.ConvertTeX() or is cousins.