链接到包含文件中的其他页面，以加载到同一父文件中

I hope this question makes sense because it seems simple, yet I can't work out exactly how to word it in an understandable way.

Basically - I have an Ajax system for loading content onto an HTML file via a seperate PHP file. This is to not need the actual page the browser has loaded to change, only the content.

What I would like to do it be able to create a link WITHIN one of the loaded content pages, which will change the content to another page via the parent. For example:

1. Load the 'menu' page using Ajax, onto a div contained in the main page
2. Click a link on the 'menu' page, and a different page is loaded onto the same div on the main page

Cheers

Create a javascript function to load content, and then create javascript: links, or onclick handlers to run it with the requested page :)