Combo box navigation help?

Dear users

I would like to use a combo box with the getUrl command.
I have a combo box called cbroom and I am populating it using AS:

cbroom.addItem(“0G1”);
cbroom.addItem(“0G2”);
cbroom.addItem(“0G3”);

I would like the use to select an item in the drop down and navigate to a location (web or document).

Can any one help, please?

Many thanks

Joe