Dyamically change textfield value

[gpalat]

concider that you have a textfield and right next to it on link that opens a pop up ".asp" page. The pop up page contains a multiple list that is built dynamically. How is it possible to select some values from the multiple list, press a submit button, close the pop up window and show these new values in the textfield?

[russell_g_1]

javascript could be used on the client side to do this. the popup window will have a reference to its opener and should be able to mess with the contents of the textbox.