Multiple lookup control instances of the same lookup field on CRM 2011 Form

Hi,

I have a CRM 2011 form with multiple control instances of the same lookup field. Each of these instances is included in a differentsection (there are about 100 different sections, that could increase).

Only one section is visible on form load, depending on a category data field, by applying the "setVisible" attribute appropriately on the sections in the onLoad javascript function.

In this situation, every time I change the visible lookup field, all the other lookup controls, which have the same control attribute, are also getting updated automatically, even if they are disabled and not visible. And this is causing a long delay when selecting a lookup value in the lookup field.

What I want is to only update the visible lookup control, and not the other 'not visible' lookup controls, in order to avoid the slow performance.

Is there any efficient way to do this?

Thank you.