just came back to this.
I got one of the ideas working. I actually tried this this morning but used the pure date instead of the just the time, which did not work.
var d = new Date();
hypeDocument.getElementById("imgcontainer").innerHTML = '<img src="' + '${resourcesFolderName}/test.gif?dummy=' + d.getTime() + '">';
test_MHv1.hype.zip (551.3 KB)