how to give download permission tobrowserFiled in blackberry?

i am able to download a PDF file from default browser.but how to download pdf file in browserfield?

i hava link in browserField when i click on that link it shoud open a popup screen like 开发者_运维技巧default browser. following is my pdf Link

updated.pdf">http://www.vistra.com/media/86238/victor_ho_pdf_for_vistra_website_-_press_release_updated.pdf

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Prior to OS 4.6 the permission required is PERMISSION_EXTERNAL_CONNECTIONS, for 4.6 and later versions of the OS it is PERMISSION_INTERNET. You can edit the application permission using the application manager, or specificall request the permission from your application using ApplicationPermissionsManager.