How do i use Select file dialog box in acrobat 7.0 using js?

hi,

I need to use file selecting dialog box in acrobat 7.0.

i already used in indesign scripting like

var f=File.selectDialog("Select a indesign file");

this will return that selected file path.

how can i use it in same acrobat 7.0

regards,
Subha_oviya