Web on PSP

Here are several article discussing the web development for PSP
Web design for the Sony PSP
What Browser Does the SONY PSP Use?

The big issue with the browser on PSP is lacking support of DOM and AJAX. For example, it doesn't support innerHTML or document.createElement/document.appendChild. The only thing it supports is document.write. There is no support of XMLHttpRequest object either. It only supports flash 6, which is also disappointing.