[Zope] How do you replace content with an action?

I need to be able to replace the content of a defined variable with an action. That action is by clicking a link that will redefine the variable with different content. Here is an example: <div tal:define="results here/view_pc_sql"> <!-- The link should replace the contents of 'results' from the previous line of code. This should only occur when the link is clicked. --> <a href="" tal:define="global results here/view_sortSysName">link</a> <div tal:define=" start request/start|python:0; batch python:here.getBatch(results)"> Any ideas? Or has someone done this before? I have been stuck on this issue since Monday. Thanks.