Working with iframe (Web Object)

I have a Web Object with javascript content that opens another module from Workday.

So basically this happens:

1. I have a storyline module with a Web Object that open an Html/Jscript landing page
2. When I user clicks on a button in that web object it opens another workday module in a new page ("_blank").

I tried using "_self" but I get an error because workday can't open another module inside the current Web Object iFrame. Also tried "_Parent" and "_Top" but for some reason in this case Workday opens the same module (the initial one) and not the one that it should redirect to.

So is there a way to close the current window and open a new window? Or open the new module at the parent level of the iFrame?