function berechne () {

for (var i=0; i<=5; i++)
  {
  if (document.who5.item1[i].checked == true)
     {
     var item1 = parseInt(document.who5.item1[i].value);
     var error1 = false;
     }
  if (document.who5.item2[i].checked == true)
     {
     var item2 = parseInt(document.who5.item2[i].value);
     var error2 = false;
     }
  if (document.who5.item3[i].checked == true)
     {
     var item3 = parseInt(document.who5.item3[i].value);
     var error3 = false;
     }
  if (document.who5.item4[i].checked == true)
     {
     var item4 = parseInt(document.who5.item5[i].value);
     var error4 = false;
     }
  if (document.who5.item5[i].checked == true)
     {
     var item5 = parseInt(document.who5.item5[i].value);
     var error5 = false;
     }
}
var score = item1 + item2 + item3 + item4 + item5;
if (item1 < 2 || item2 < 2 || item3 < 2 || item4 < 2 || item5 < 2)
   depr = true;
else
   depr = false;
if (score < 13 || depr == true)
   document.who5.Ausgabe.value = "It is impossible to rule out a depression. We recommend you to attend a physician or psychotherapist to check for the need of therapy.";
else
  document.who5.Ausgabe.value = "There is no evidence for a depression.";

if (error1 == false && error2 == false && error3 == false && error4 == false && error5 == false)
   error = false;
else
   {
   error = true;
   document.who5.Ausgabe.value = "We need answers to all questions to give you a test-result. Please choose one answer in each row!";
   }
return
}