The name of the window, or frame, in which response HTML will be shown.
Blank – response HTML will be shown in the current window.
The name of a window or frame, in single quotes. A list of known windows and frames can be displayed by clicking on the corresponding dropdown button in the property sheet, or a unique name can be entered.
'_blank' will launch in a new window
'_media' will launch a media panel in the current window
'_search' will launch a search panel in the current window
'_parent' will launch in the parent window (usually the current window)
'_top' will launch in the top window (usually the current window)
Note that _search and _media are supported by Internet Explorer 6 only.