Silverlight 5 code not working on SAFARI 8

Im using this code in javascript to get the filenames inside a Silverlight 5 fileupload control.

var sl = document.getElementById("SilverlightControl");

var SLFileNames = sl.Content.FileUploader.GetFileNames();

It works fine on other browsers but it returns 'undefined' on SAFARI 8.

Any work around for this on Javascript for safari 8?