vReturnValue = window.showModalDialog(sURL [, vArguments] [, sFeatures])
sFeatures Optional.
String that specifies the window ornaments for the dialog box, using one or more of the following semicolon-delimited values: dialogHeight:sHeight Sets the height of the dialog window (see Remarks for default unit of measure).
dialogLeft:sXPos Sets the left position of the dialog window relative to the upper-left corner of the desktop.
dialogTop:sYPos Sets the top position of the dialog window relative to the upper-left corner of the desktop.
dialogWidth:sWidth Sets the width of the dialog window (see Remarks for default unit of measure).
center:{ yes | no | 1 | 0 | on | off } Specifies whether to center the dialog window within the desktop. The default is yes.
dialogHide:{ yes | no | 1 | 0 | on | off } Specifies whether the dialog window is hidden when printing or using print preview. This feature is only available when a dialog box is opened from a trusted application. The default is no.
edge:{ sunken | raised } Specifies the edge style of the dialog window. The default is raised.
help:{ yes | no | 1 | 0 | on | off } Specifies whether the dialog window displays the context-sensitive Help icon. The default is yes.
resizable:{ yes | no | 1 | 0 | on | off } Specifies whether the dialog window has fixed dimensions. The default is no.
scroll:{ yes | no | 1 | 0 | on | off } Specifies whether the dialog window displays scrollbars. The default is yes.
status:{ yes | no | 1 | 0 | on | off } Specifies whether the dialog window displays a status bar. The default is yes for untrusted dialog windows and no for trusted dialog windows.
unadorned:{ yes | no | 1 | 0 | on | off } Specifies whether the dialog window displays the border window chrome. This feature is only available when a dialog box is opened from a trusted application. The default is no.