Select-popup positioning


I am having trouble working how where the ‘select-popup’ class divs are getting their positions from. I am using a design based on the computer shop template and it seems there is some JavaScript dynamically adding in-line styling so that the popups are absolutely positioning in the right place. Unfortunately somewhere along the line they are now popping up in the wrong place. Does anyone know where I can change this behaviour?

Just to clarify, these are the div’s for the ‘view as’ and ‘sort by’ popups.