refreshImage = function(img) {
    var source = img.src;
    img.src = '';
    
    source = source.split('?')[0];
    source = source + '?' + new Date().getTime();
    
    img.src = source;
}

addParametersToFormAction = function(formId, parameters) {    
    var frm = $(formId);    
    if (frm != undefined) {
        frm.action += "?" + parameters;
    }
}