GeoRSS (XML with go:lat, geo;long nodes) jQuery parsing, with performances improvements

georss.js

$.fn.filterNode = function(name) {
    return this.find('*').filter(function() {
        return this.nodeName === name;
    });
};

// example: 'http://www.emsc-csem.org/service/rss/rss.php?typ=emsc&min_lat=10&min_long=-30&max_long=65';
// (EMSC - Last 50 earthquakes in euro mediteranean region)
function handleRSS(url) {
    $.ajax({
        type: "GET",
        url: url
        }).done(function(xml) {

        var lats = [];
        var longs = [];
        var latlongs = [];
        // See http://goo.gl/jePWH + http://goo.gl/1uHiQ
        $(xml).filterNode('geo:lat').each(function() {
            lats.push($(this).text());
        });
        $(xml).filterNode('geo:long').each(function() {
            longs.push($(this).text());
        });
        for(i=0;i<lats.length;i++){
            latlongs.push([lats[i], longs[i]]);
        }
        return latlongs; // TODO : return titles, etc.
    });
}