By learning HTML, Javascript and some CSS. But it will take some time.
The transaction and query runners are key to this so as a first step it makes sense to build your own MII-Javascript library for common tasks:
-calling a transaction or query
-parsing the data and storing it in a easy way to handle inside Javascript
JQuery is a very complete and easy library that will make your life much easier.
Some aspects to get started:
$.ajax
$.Deferred
some patterns:http://shichuan.github.io/javascript-patterns/
Alternatively: contact a webdevelopper.