triggering clicky after custom variables changed in javascript

Hi - I use bootstrap tabs on my page. I would like to update the clicky custom properties every time a new tab shows. I tried handling it in the on show event of the tab like this:

clicky_custom.href = "/myurl?tab=" + tabnum;
clicky_custom.title = 'myurl' + tabnum;

My page handles the tab as query string parameters too so the heatmap can work. However, I am noticing that it is only registering events for the url initially set on page load. Is there something extra that needs to be done to trigger clicky to register events as a separate url?