// <script>

// Copyright (C) 2005 Ilya S. Lyubinskiy. All rights reserved.
// Technical support: http://www.php-development.ru/
//
// YOU MAY NOT
// (1) Remove or modify this copyright notice.
// (2) Distribute this code, any part or any modified version of it.
//     Instead, you can link to the homepage of this code:
//     http://www.php-development.ru/javascripts/dropdown.php.
//
// YOU MAY
// (1) Use this code on your website.
// (2) Use this code as a part of another product provided that
//     its main use is not creating javascript menus.
//
// NO WARRANTY
// This code is provided "as is" without warranty of any kind, either
// expressed or implied, including, but not limited to, the implied warranties
// of merchantability and fitness for a particular purpose. You expressly
// acknowledge and agree that use of this code is at your own risk.


// ----- Popup Control ---------------------------------------------------------

function at_display(x)
{
  var win = window.open();
  for (var i in x) win.document.write(i+' = '+x[i]+'<br>');
}

// ----- Show Aux -----

function at_show_aux(par, child)
{
  var p = document.getElementById(par);
  var c = document.getElementById(child );

  var top  = (c["at_position"] == "y") ? p.offsetHeight+2 : 0;
  var left = (c["at_position"] == "x") ? p.offsetWidth +2 : 0;

  for (; p; p = p.offsetParent)
  {
    top  += p.offsetTop;
    left += p.offsetLeft;
  }

  c.style.position   = "absolute";
  c.style.top        = top +'px';
  c.style.left       = left+'px';
  c.style.visibility = "visible";
}

// ----- Show -----

function at_show()
{
  var p = document.getElementById(this["at_parent"]);
  var c;
  if (this["at_child" ] != undefined) {
    c = document.getElementById(this["at_child" ]);
    at_show_aux(p.id, c.id);
  }

  if (this.id == this["at_parent"]) highlight_on_internal_p(p);

  if (c != undefined) {
    clearTimeout(c["at_timeout"]);
  }
}

// ----- Hide -----

function at_hide()
{
  var c = document.getElementById(this["at_child"]);
  var p = document.getElementById(this["at_parent"]);
  highlight_off_internal_p(p);

  if (c != undefined) {
      c["at_timeout"] = setTimeout("document.getElementById('"+c.id+"').style.visibility = 'hidden'", 50);
  }
}

// ----- Click -----

function at_click()
{
  var p = document.getElementById(this["at_parent"]);
  var c = document.getElementById(this["at_child" ]);

  if (c.style.visibility != "visible")
       at_show_aux(p.id, c.id);
  else c.style.visibility = "hidden";

  return false;
}

function highlight_on_internal_p(elem) {
    elem.className='menu_button_highlight';
}

function highlight_off_internal_p(elem) {
    elem.className='menu_button';
}

function highlight_on_internal_c(elem) {
    elem.className='item_button_highlight';
}

function highlight_off_internal_c(elem) {
    elem.className='item_button';
}

function highlight_on_p() {
    highlight_on_internal_p(this);
}

function highlight_off_p() {
    highlight_off_internal_p(this);
}

function highlight_on_c() {
    highlight_on_internal_c(this);
}

function highlight_off_c() {
    highlight_off_internal_c(this);
}

// ----- Attach -----

// PARAMETERS:
// parent   - id of visible html element
// child    - id of invisible html element that will be dropdowned
// showtype - "click" = you should click the parent to show/hide the child
//            "hover" = you should place the mouse over the parent to show
//                      the child
// position - "x" = the child is displayed to the right of the parent
//            "y" = the child is displayed below the parent
// cursor   - Omit to use default cursor or check any CSS manual for possible
//            values of this field

function at_attach(par, child, position, cursor)
{

  var p = document.getElementById(par);
  var c = document.getElementById(child);

  p["at_parent"]     = p.id;
  p["at_position"]   = position;

  if (cursor != undefined) p.style.cursor = cursor;

  p.onmouseover = at_show;
  p.onmouseout  = at_hide;

  if (c != undefined) {
      p["at_child"]      = c.id;
      c["at_position"]   = position;
      c["at_parent"]     = p.id;
      c["at_child"]      = c.id;
      c.style.position   = "absolute";
      c.style.visibility = "hidden";
      c.onmouseover = at_show;
      c.onmouseout  = at_hide;
      var children = c.childNodes;
      for (var i = 0; i < children.length; i++) {
        if (children[i].nodeType == 1) {
            children[i].onmouseover = highlight_on_c;
            children[i].onmouseout = highlight_off_c;
        }
      }
  }
}