http://spjsblog.com/2013/12/08/spjs-upload-for-sharepoint-custom-upload-page-for-uploading-documents-to-various-document-libraries-in-a-site-collection/?utm_source=tuicool

http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.utilities.sputility.aspx

http://msdn.microsoft.com/en-us/library/dd902097(office.12).aspx

http://www.nullskull.com/q/10174586/customize-uploadaspx-page.aspx

http://www.cnblogs.com/xufei/p/uploadify.html

SPJS Upload for SharePoint: Custom upload page for uploading documents to various document libraries in a site collection