//This is used in conjunction with the HtmlHelper.Uploadify extension method.
function initUploadify(control, uploadUrl, fileExtensions, fileDescription, authenticationToken, errorFunction, completeFunction) {
    var options = {};

    options.script = uploadUrl;
    options.uploader = '/content/swf/uploadify.swf';
    options.cancelImg = '/content/site_images/cancel.png';
   
    options.auto = true;
    options.scriptData = { AuthenticationToken: authenticationToken };
    options.fileExt = fileExtensions;
    options.fileDesc = fileDescription;

    if (errorFunction != null) {
        options.onError = errorFunction;
    }

    if (completeFunction != null) {
        options.onComplete = completeFunction;
    }

    control.uploadify(options);
}