Load secondaire menu Maximenu trough ajax call

I use this module menu, and this is big. The problem is every time a page load, the whole menu will be loaded, with all the DOM Elements.

would is be possible to make a ajax call from this. So the primaire menu 1 2 3 loads with every pageload and the second menu 1a 1b 1c only loads when you click on the primaire button.

Hi
this would need many modifications into the script. I understand why you want to do that, but keep in mind that in this way your links are not taken into account for the SEO
CEd