security warning error when used with ssl only on IE

I have gmap and ecommerce module installed.
I am using secure urls to secure the ecommerce related pages. Since the gmap.gs is inserted in the header I keep getting security warning

This page contains both secure and nonsecure items.

Do you want to display the nonsecure items?

The solution micrsoft suggesting is
To resolve this problem for a page that will be downloaded through SSL, set the SRC attribute of the IFRAME.
If the IFRAME is not expected to have a SRC attribute initially, point the IFRAME to a dummy HTML page.

i.e

This is a very dumb solution but we are working with IE so I have to do it.

I tried many things to insert this in the iframe created by gmap.js but couldnt resolve it. I will appreciate, If somebody lets me know how this can be resolved.