function vz_c(citi,type) {
    var req = new JsHttpRequest();
    req.onreadystatechange = function() {
        if (req.readyState == 4) {
		document.getElementById('forma').innerHTML = req.responseJS.src;}}
    req.open(null, '/calculator.php?vz_c='+citi, true);
    req.send();}