IE automation: able to change dropdown list value but webpage doesn't update

[Sandstedt]

From what I understand, the dropdown list should trigger a javascript function but is unable to do so when I change its value in VBA.

I have tried to find the name of the function and its parameters, but my knowledge of html and javascript is very limited. Is it possible to trigger the script by some kind of change-, click-, or mouseup-event?

Edit: It might be this function:

<script type="text/javascript">
	var steal = { startFile: "avanzabank", env: "production", loaded: ['avanzabank/production.css'], production: "/js/jmvc/avanzabank/production.js?ver=r90645.10" }
</script>