I looking at web2py book here:
http://web2py.com/books/default/chapter/34/05
Tha A helper takes a special argument called cid. It works as follows:
> {{=A('linked page', _href='http://example.com', cid='myid')}}
> <div id="myid"></div>
>
> and a click on the link causes the content to be loaded in the div. This
> is similar but more powerful than the above syntax since it is designed to
> refresh page components. We discuss applications of cid in more detail in
> Chapter 12, in the context of components.
> These ajax features require jQuery and "static/js/web2py_ajax.js", which
> are automatically included by placing {{include 'web2py_ajax.html'}} in
> the layout head. "views/web2py_ajax.html" defines some variables based on
> request and includes all necessary js and css files.
Here's what I've done:
index page:
{{extend "layout.html"}}
<p>{{=A(post.title,
_href=URL('default','view',args=[post.id],user_signature=True),
cid='post1234')}}</p>
<div id="post1234"></div>
But when I click on the link, nothing appears in the <div id="post1234" />.
I didn't make changes to layout.html, which means, web2py_ajax.html is
already included.
When it is a normal link (aka no cid in the A helper), the page ("view")
loads fine.
>
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