First make an IFRAME on the Account Form, something like this:
After that, add some JavaScript to your page. Make sure it is activated on the OnLoad event.
function ShowBingMap()
{if (Xrm.Page.getAttribute("address1_line1").getValue() != null)
{
var strURL = ("http://www.bing.com/maps/default.aspx?where1=" + Xrm.Page.getAttribute("address1_line1").getValue() + "," + Xrm.Page.getAttribute("address1_city").getValue());
Xrm.Page.getControl("IFRAME_TEST").setSrc(strURL);
}
else
{
Xrm.Page.getControl("IFRAME_TEST").setSrc("about:blank");
}
}
After these modifications your Form should look something like this: