function toggleCheck(el) {
  var inp = el.getElementsByTagName("input")[0];
  if (inp.checked == true) {
    inp.checked = false;
    el.className = "check-row";
  } else {
    inp.checked = true;
    el.className = "check-row checked";
  }
}

function updateCheck() {
  var inps = document.getElementsByTagName("input");
  for (i=0; i<inps.length; i++) {
    if (inps[i].parentNode.className == "check-row") {
      inps[i].parentNode.className = (inps[i].checked ? "check-row checked" : "check-row");
    }
  }
}