not download ,it's upload.when I visit facebook on the web,it let me check my account. I did it according the instructions.but i need to upload the picture of my ID card int the following form,however the button "选择文件" didn't work,it told me invalid upload.MY Problem is that I can't upload the picture of my ID card when i check my account.

Facebook told to do authentication .I have the same problem .When I click the button"选择文件",and then choose the picture file,however the site still showed me "未选择文件",if I click "continue",It show will show me upload fail.I'm in China .The button "选择文件"didn't work,after clicking it,the site still shows me the following picture.