function swap(targetId) {
  if (document.getElementById) {
    target = document.getElementById(targetId);
    if (target.style.display == "none") {
      target.style.display = "block";
    } else {
      target.style.display = "none";
    }
  }
}

function show(targetId) {
  if (document.getElementById) {
    target = document.getElementById(targetId);
      target.style.display = "block";
  }
}

function hide(targetId) {
  if (document.getElementById) {
    target = document.getElementById(targetId);
      target.style.display = "none";
  }
}
function comalert(str) {
  alert("comalert "+str);
}