function show(divId) {
  document.getElementById(divId).style.display = "block";
}

function showPopup(divId, parent) {
  document.getElementById(divId).style.display = "block";
  document.getElementById(divId).style.left = getLeftOffset(parent);
}

function hide(divId) {
  document.getElementById(divId).style.display = "none";
}

function getLeftOffset(objElem) {
  var intReturn = 0;   
  while(objElem != null) {
    intReturn += objElem.offsetLeft;
    objElem = objElem.offsetParent;
  }
  return intReturn;
}