Javascript document variable names for complex forms

Hello people. First , let me thanks all of you who answered my mime-mail question (special Richard Lynch). Next question (probably not for proper list, but I couldn't get answer, so please sorry me). I have http frame page (classical 'top', 'left' and 'center' frames), then 'center' frame opens new window. From this new windows, I need access some 'top' document variable names-values. I tried all possible combinations, but couldn solve this. Examples: (from into new-window, child of 'center' frame) var myvar = parent.top.document.form.var.value var myvar = top.document.form.var.value var myvar = parent.parent.top.document.form.var.value Thanks in advance Miguel