Can't add image from outside source to upfront code element

Hey guys,

I have been trying in vain to get this working but maybe there is a workaround.

The image element only allows for images coming from the media library or upload.
So I added a code element and added the following html:

<img src="https://secure.e2rm.com/registrant/BasicThermometer.aspx?eventid=117990&langpref=en-CA&rID=3659437&isTeam=0&isForEmail=1"/>

When I try to save, it always complains that there is an html error and will not save.

It works fine in w3scools tryit editor... so I know the code is ok. http://www.w3schools.com/html/tryit.asp?filename=tryhtml_basic

Thanks!