function editpage() {
 var show = true;
 if(document.getElementById("content_editor").style.visibility == "visible") {
  show = false;
 }
 
 if(show == true) {
  document.getElementById("editable_content").style.visibility = "hidden";
  document.getElementById("editable_content").style.display = "none";
  document.getElementById("content_editor").style.visibility = "visible";
  document.getElementById("content_editor").style.display = "block";
 } else {
  document.getElementById("editable_content").style.visibility = "visible";
  document.getElementById("editable_content").style.display = "block";
  document.getElementById("content_editor").style.visibility = "hidden";
  document.getElementById("content_editor").style.display = "none";
  document.getElementById("editable_content").innerHTML = document.forms["pageeditor"].content.value;
 }
}