function popUpDiv(content){
  content += "<br /><br /><br /><a onClick=\"document.getElementById('popUpDiv').style.display = 'none';\" href=\"#\">Close This Window</a><br /><br />";
  document.getElementById('popUpDiv').innerHTML = "<div class=\"inner_content\">" + content + "</div>";
  document.getElementById('popUpDiv').style.display = 'block';
}