How to allow input type=file to accept only image files

Question

I need to upload file which is an image.I am using .But it will accept all types of files.I need only files with extensions such as .jpg,.jif etc.How can I make the upload dialogue to select only image files . Thanks in advance

Answer 1

You can't achieve this using standard input control. Common techniques include validating this on the server side or use some Flash upload control which allows more customizations. Also bare in mind that verifying the file extension is a necessary but not a sufficient condition that a file is image. There's nothing preventing the user from renaming an executable to .jpg for example.