Reading a binary file through AJAX

binaryfile.js

// See https://developer.mozilla.org/en/DOM/XMLHttpRequest/Sending_and_Receiving_Binary_Data
var readBinaryFile = function (url) {
    var content, newContent = "";

    $.ajax({
        dataType: 'text',
        mimeType: 'text/plain; charset=x-user-defined',
        url: url,
        async: false,
        cache: false,
        success: function (theContent) {
            for (var i = 0; i < theContent.length; i++) {
                newContent += String.fromCharCode(theContent.charCodeAt(i) & 0xFF);
            }
            content = newContent;
        }
    });

    return content;
};