conditionally load JQuery 2 for new browsers

gistfile1.html

<script>
// set a global version var for cache busting
var CITY_VERSION = "%globals_snippet_77381%.";

yepnope([
{
    test: 'querySelector' in document && 'localStorage' in window && 'addEventListener' in window,
    yep: {
        "jQuery2" : '//ajax.aspnetcdn.com/ajax/jQuery/jquery-2.0.3.min.js'
    },
    nope: {
        'jQuery1': '//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js'
    },
    callback: {
        "jQuery1" : function (url, result, key) {
            if (!window.jQuery) {
                yepnope('local/jquery.min.js');
            }

        },
        "jQuery2" : function (url, result, key) {
            if (!window.jQuery) {
                yepnope('local/jquery.min.js');
            }
        }
    }
}, {
    // this should download as soon as this line is executed, but won't be executed until after the local jquery is loaded
    load : "//ajax.googleapis.com/ajax/libs/jqueryui/1.10.2/jquery-ui.min.js"
}, {
    load : "//s1.dev.city.ac.uk/cassrmain/js/%globals_snippet_77381%.cassrmain.js",
    callback : function (url, result, key) {
        CASS.init();
    }
}
]);
</script>