This simple blueprint accepts any string on its input terminal and the associated handler function sets innerHTML on the infotrons DOM node to the contents of the message.
<div id="alerter"
impl="~01A08F0900C9364429BB78BBC03401C3BE"
script="http://localhost/Html.js">
</div>
It just chucks any incoming message as innerHTML on the node where it is defined. It had better be HTML, or at least text.