Ventana emergente en boton de form

Abrir una ventana emergente al pulsar el boton submit de un formulario html.

<form action="blablá" method="post" target="ventanita" onsubmit="ventanita=window.open('','ventanita','wi dth=300,height=300')">

Propiedades de window.open

Syntax

window.open(URL,name,specs,replace)

Parameter	Description
URL	Optional. Specifies the URL of the page to open. If no URL is specified, a new window with about:blank is opened
name	Optional. Specifies the target attribute or the name of the window. The following values are supported: _blank - URL is loaded into a new window. This is default _parent - URL is loaded into the parent frame _self - URL replaces the current page _top - URL replaces any framesets that may be loaded name - The name of the window
specs	Optional. A comma-separated list of items. The following values are supported: channelmode=yes|no|1|0 Whether or not to display the window in theater mode. Default is no. IE only directories=yes|no|1|0 Whether or not to add directory buttons. Default is yes. IE only fullscreen=yes|no|1|0 Whether or not to display the browser in full-screen mode. Default is no. A window in full-screen mode must also be in theater mode. IE only height=pixels The height of the window. Min. value is 100 left=pixels The left position of the window location=yes|no|1|0 Whether or not to display the address field. Default is yes menubar=yes|no|1|0 Whether or not to display the menu bar. Default is yes resizable=yes|no|1|0 Whether or not the window is resizable. Default is yes scrollbars=yes|no|1|0 Whether or not to display scroll bars. Default is yes status=yes|no|1|0 Whether or not to add a status bar. Default is yes titlebar=yes|no|1|0 Whether or not to display the title bar. Ignored unless the calling application is an HTML Application or a trusted dialog box. Default is yes toolbar=yes|no|1|0 Whether or not to display the browser toolbar. Default is yes top=pixels The top position of the window. IE only width=pixels The width of the window. Min. value is 100
replace	Optional.Specifies whether the URL creates a new entry or replaces the current entry in the history list. The following values are supported: true - URL replaces the current document in the history list false - URL creates a new entry in the history list