hyperlink action auto repeated on dropdown change

page 1 - user selects a dropdown. hidden field gets set with dropdown value.
click on hyperlink1 - action sets request bean variable with the hidden field value and navigates to page 2 in new window.

works fine the first time.

however if the page1 dropdown value gets changed the hyperlink1 action is repeated - displays page 2 in new window with the new value.

this continues as i keep changing the dropdown.

Any ideas?

appreciate any help.