1function candidateNames() {
2  var inputs = document.getElementsByTagName("input");
3  var result = [];
4  for ( var i = 0; i < inputs.length; i += 1 ) {
5      result[i] = inputs[i].value;
6
7      if (inputs[i].value == '') { // check if value is empty
8          alert('Need to fill inputs');
9          return; // stop the function
10      }
11
12}
13    document.getElementById("candidateName1").innerHTML = result[0];
14    document.getElementById("candidateName2").innerHTML = result[1];
15    document.getElementById("candidateName3").innerHTML = result[2];
16}
17
18//Event listener to calculate button to call all above functions
19document.getElementById("btn").addEventListener("click", calculateVotes, false);
20
21function calculateVotes() {
22  candidateNames();
23}