Board Thread:Support Requests - Getting Technical/@comment-26917000-20160422231028/@comment-1757994-20160429212821

Give up on iframes. I don't understand your obsession with iframes.

Otherwise, the following code snippet does what I described previously, combined with  and some HTML element with id="marker".

Be aware that getJSON completes asynchronously, so you probably need to stick this code in the document.ready function (or something called by document.ready).