function tester() {
var a = 0
var b = 0
var c = 0
var d = 0
var e = 0
var f = 0
var g = 0
var h = 0
var i = 0
var l = 0
var m = 0
var n = 0
var o = 0
var p = 0
var q = 0
var r = 0
var s = 0
var t = 0
var u = 0
var v = 0


if(document.forms[0].elements[0].checked==true) {
a = 1
}
if(document.forms[0].elements[2].checked==true) {
b = 1
}
if(document.forms[0].elements[5].checked==true) {
c = 1
}
if(document.forms[0].elements[6].checked==true) {
d = 1
}
if(document.forms[0].elements[9].checked==true) {
e = 1
}
if(document.forms[0].elements[11].checked==true) {
f = 1
}
if(document.forms[0].elements[13].checked==true) {
g = 1
}
if(document.forms[0].elements[14].checked==true) {
h = 1
}
if(document.forms[0].elements[17].checked==true) {
i = 1
}
if(document.forms[0].elements[19].checked==true) {
l = 1
}
if(document.forms[0].elements[20].checked==true) {
m = 1
}
if(document.forms[0].elements[22].checked==true) {
n = 1
}
if(document.forms[0].elements[24].checked==true) {
o = 1
}
if(document.forms[0].elements[26].checked==true) {
p = 1
}
if(document.forms[0].elements[29].checked==true) {
q = 1
}
if(document.forms[0].elements[30].checked==true) {
r = 1
}
if(document.forms[0].elements[32].checked==true) {
s = 1
}
if(document.forms[0].elements[34].checked==true) {
t = 1
}
if(document.forms[0].elements[36].checked==true) {
u = 1
}
if(document.forms[0].elements[39].checked==true) {
v = 1
}
total = a + b + c + d + e + f + g + h + i + l + m + n + o + p + q + r + s + t + u + v  

if(total == 20) {
alert("20 risposte esatte su 20, bravissimo!")
}

if(total < 20) {
alert("Hai fornito " + total + " risposte esatte su 20, prova ancora!")
}

}