If you want someone to select a link that navigates to someones email address without opening a window, your first instinct would be to do this: navigateToURL("mailto:some.email@myemail.com", "_self");

This works fine in most browsers but Internet Exporer IE opens a new window which says something like there is an error trying to navigate to that page.

There are probably a few ways around this so here is one. Basically use an externalInterface  to call the built-in javaScript assign() method and pass in the target url.

Eg: ExternalInterface.call("window.location.assign", "mailto:some.email@myemail.com");