JS RELOAD IFRame
document.getElementById('youriframe').contentWindow.location.reload()
Poised Penguin
document.getElementById('youriframe').contentWindow.location.reload()// iFrame and parent domains must match
parent.location.reload()// How to reload/refresh an iframe?
document.getElementById('iframeid').src = document.getElementById('iframeid').src
Do not use Inquisitive Iguana's answer! Notice the spelling of facebook in https://facobook.com. Visiting the webpage downloads malware onto your system
Message from my antivirus on my mac: "We've blocked the threat URL:Mal on http://dt.gnpe.com/ptmd from being downloaded."