Parsing text file to JS loaded through ajax request

parseCSV.js

// @see http://www.amcharts.com/tutorials/loading-external-data/

/*
2011-02-23,133034
2011-02-24,122290
2011-02-25,383603
2011-02-28,125285
2011-03-01,118042
2011-03-02,102500
2011-03-03,434047
2011-03-04,422374
2011-03-07,396473
2011-03-08,453142
*/

function loadCSV (file) {
    var request;
    if (window.XMLHttpRequest) {
        // IE7+, Firefox, Chrome, Opera, Safari
        request = new XMLHttpRequest();
    } else {
        // code for IE6, IE5
        request = new ActiveXObject('Microsoft.XMLHTTP');
    }
    // load
    request.open('GET', file, false);
    request.send();
    parseCSV(request.responseText);
}

function parseCSV (data) {
	//replace UNIX new lines
	data = data.replace (/\r\n/g, "\n");
	//replace MAC new lines
	data = data.replace (/\r/g, "\n");
	//split into rows
	var rows = data.split("\n");
	
	var chartData = [];
	
	// loop through all rows
	for (var i = 0, len = rows.length; i < len; i++) {
	    // this line helps to skip empty rows
	    if (rows[i]) {
	        // our columns are separated by comma
	        var column = rows[i].split(",");
	
	        // column is array now 
	        // first item is date
	        var date = column[0];
	        // second item is value of the second column
	        var value = column[1];
	
	        // create object which contains all these items:
	        var dataObject = {
	            date: date,
	            visits: value
	        };
	        // add object to chartData array
	        chartData.push(dataObject);
	    }
	}
    return chartData;
}

var data = loadCSV("data.txt");
parseCSV(data);