csv.js

function loadCSV(url, columns, callback) {
    var req = new XMLHttpRequest();
    req.open('GET', url, true);   
    req.onreadystatechange = function (aEvt) {  
        if (req.readyState == 4) {// && req.status == 200) {  
            callback(parseCSV(req.responseText, columns));
        }  
    };  
    req.send(null);
}

function parseCSV(txt, columns) {
    var rows = [];
    var lines = txt.split('\n');
    for (var i = 0; i < lines.length; i++) {
        var words = lines[i].split(',');
        var realwords = [];
        for (var j = 0; j < words.length; j++) {
            var word = words[j];
            while (word.charAt(0) == '"' && word.match(/"/g).length % 2 != 0 && j < words.length) {
                word += ',' + words[j+1];
                j+=1;
            }
            realwords.push(word);
        }
        if (realwords.length == columns.length) {
            var row = {};
            for (var j = 0; j < columns.length; j++) {
                row[columns[j]] = realwords[j];
            }
            rows.push(row);
        }
        else {
            console.warn('bad line: ' + lines[i]);
            console.warn('realwords: ' + realwords);
        }
    }
    return rows;
}