How to accept photo upload in the form?

How can I add. Add an image to my contact form, so customer can submit their phots to me

You need to add a file upload field to your form. Here's how you can do that: http://www.jotform.com/help/29-Upload-Field-Allowed-File-Types.

Make sure to change the file size limit: http://www.jotform.com/help/33-Changing-the-Upload-Size-Limit. 

Thanks