Hi,

 

When your specify the UploadType=IFrame , or the browser do not install the Flash/Silverlight ,

 

the uploader will create an iframe and <input type=file> to do the upload task.

 

For IE/Chrome , it will allow file.click() method to prompt the browsing dialog ,

 

but for Firefox/Safari , the browsers require user click on the real <input type=file> ,

 

So uploader just show the normal file upload control for that case.

 

Regards,
Terry