var tableRows = document.getElementById("members").children[1];
var memberLinks = tableRows.getElementsByTagName("a");
var startButton =  document.createElement('div');
startButton.innerHTML = "Run Game!"
startButton.style.position = "fixed";
startButton.style.bottom = "2px";
startButton.style.right = "2px";
startButton.style.padding = "20px";
startButton.style.borderRadius = "25px";
startButton.style.backgroundColor = "yellow";
startButton.style.cursor = "pointer";
document.body.appendChild(startButton);

var i = 0;
var l;

function listenForClick(e) {
  e.preventDefault();
  var obj = this;
  if (obj.style.backgroundColor === "yellow") {
    obj.style.backgroundColor = "";
  } else {
    obj.style.backgroundColor = "yellow";
  }
}

function gamble() {
  var members = [];
  for (i=0, l=memberLinks.length; i<l; i++) {
    if (memberLinks[i].style.backgroundColor === "yellow") {
      members.push(memberLinks[i].innerHTML);
    }
  }
  l = members.length;
  n = Math.floor(Math.random() * l);
  alert(members[n]);
}

for (i=0, l=memberLinks.length; i<l; i++) {
  //alert(memberLinks[i].innerHTML);
  memberLinks[i].addEventListener("click", listenForClick);
  memberLinks[i].style.backgroundColor = "yellow";
}

startButton.addEventListener("click", gamble);