Email attachments alert

I would like to put an alert on the emailing of documents where the flag to email an attachment is on

If a user has uploaded an attachment and wants to email it.

When we get to email and the user forgets to select the attachment he wants to send with the email.

An alert to come up to say

You have uploaded attachments to be sent with this email, but you have not selected the ones you want to send with this email

Continue without sending any attachments

Cancel to go and select attachments

Continue     

Cancel

If the user has selected the attachments, then you don’t need to pop up this message

This is to help the user remember that he attached documents to send with the email, but most times people forget to select them to email