Filling Webform via VBA

Hi Folks,

as my knowledge of HTML and Javascript is close to non-existence, I hope you are able to help me.
I used to use a VBA macro similar to the one below to automate one of our internal webpages.

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Unfortunately the previous intranet page was replaced by a new fancy one containing loads of Javascript.
Analying the webpage using the "inspector" in firefox, it tells me the "inner HTML" and outer HTML of one of the control elements looks like it is shown in the attached file.

Imagine I would like above macro to select this control element and select "F6P430". How would I need to adjust my macro?

Thanks for your help

Theo