Due to the way the message field is done, the data in it isn’t held when you go on to the next page. Clearing the message box when the images load was an attempt to remedy this. When you submit the form the text was stored in a variable, then if you hit the back button that variable remained, and was written to the box. Unfortunately when you first access the page the script writes the variable (which is empty, to the box, and due to the slowness of the page loading, sometimes erases what’s already been written.

Now that I’ve added the thing that catches the blank name field, I can remove the part that stores the message, and writes it when the back button is pressed.