Taking a value from one window to another

I want to be able to allow a user to select a word from a list of words, but instead of using a drop down list, I want the user to click a button - which opens a new window containing the list of words, double click on the word (or words) selected, and the value of the word that was double clicked is automatically transferred to a text box in the previous (calling) window. Is this possible in ASP.NET?Passing data back to a parent window is entirely possible via lowly javascript - with or without ASP.NET server technology, but the user interaction method you have decided upon would be a little more unstable across browsers.
window.opener.document.getElementById('textbox1').value = "something";