The \href{} macro gives a way to provide click actions for your equations by using a javascript: URL. For example \text{Math} + \href{javascript:alert("MathJax is Cool!")} {\color{black}{\text{MathJax}}} = \text{Fun!} produces \[ \text{Math} + \href{javascript:alert("MathJax is Cool!")} {\color{black}{\text{MathJax}}} = \text{Fun!} \]