Open Page in same window using window.open function in JavaScript

thank you sir

i already solved this by doing this

If e.CommandName = "GetItem" Then

Dim popupScript As String = "<script language='javascript'>" & _
"window.open('../Main/Equipment.aspx?item_ID=" & e.CommandArgument & "', '_self', " & _
"'width=885, height=850, menubar=yes,toolbar=no, resizable=yes, scrollbars=yes') " & _
"</script>"

If (Not cs.IsStartupScriptRegistered("PopupScript")) Then
cs.RegisterStartupScript(cstype, "PopupScript", popupScript)
End If

thank you btw :)