novel way of ie6 detection that doesn't rely on user agent sniffing

gistfile1.js

    /**
     *  Property: mapTypes
     *  The types of map we're switching between
     */
    mapTypes: (function() {
        
        var div = document.createElement('div');
        div.innerHTML = '<!--[if lte IE 6]><i></i><![endif]-->';
        
        if (!!div.getElementsByTagName('i').length) {
            return ['normal', 'satellite', 'terrain'];
        }

        return ['normal', 'satellite', 'hybrid'];
    }()),