I have a HTML file, attached, where I do not have control over what appears in the BODY. I can only add code to the head of the document.
It has a heading "Additional Details" (that appears exactly as I have quoted it here).
I have attached a sample HTML file.
So to summarise: when someone clicks on the Additional Details heading, I need the table to show, but I cannot add the onClick code to the h3 tag - it must be added above, in the header.