A Local Link is one that changes the content of its parent module only

< a href="m502.html" class="local" >m502< /a >
< a href="m503.html" class="local" >m503< /a >

Go to module Ajax Forms
Go to module Tab Link

Just add a class="local" attribute and it will work. Web pages normally don't need this feature, but when loaded as a module in this framework, links without the "local" mark will affect the entire page by default.