var on_parent="";

function at_display(x){
  win = window.open();
  for (var i in x) win.document.write(i+' = '+x[i]+'<br>');
}
// ----- Show Aux -----
function at_show_aux(parent, child){
  var p = document.getElementById(parent);
  var c = document.getElementById(child);
 clearTimeout(c["at_timeout"]);
  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 - 2 +'px';
  c.style.left       = left - 1 +'px';
  

	if (on_parent!=document.getElementById(parent).id){
	  //alert("on_parent:" + on_parent + "\np:" + p.id );
	at_hide_all();
	$(child).appear({ duration: 0.25 });
	}
	else{
	$(child).appear({ duration: 0.0 });
	}
  on_parent = document.getElementById(parent).id ;
   clearTimeout(c["at_timeout"]);
}
// ----- Show -----

function at_show(){	
 clearTimeout(c["at_timeout"]);
  p = document.getElementById(this["at_parent"]);  
  if (on_parent!=p.id){
  //alert("on_parent:" + on_parent + "\np:" + p.id );
  at_hide_all();
  }  
  c = document.getElementById(this["at_child" ]);
  at_show_aux(p.id, c.id);
  clearTimeout(c["at_timeout"]);
}

// ----- Hide -----
function at_hide(){
  c = document.getElementById(this["at_child"]);
  //$(this["at_child"]).invoke('hide');
  c["at_timeout"] = setTimeout("document.getElementById('"+c.id+"').style.display = 'none'", 180);  
  //c["at_timeout"] = setTimeout('c.hide()', 333);
}
function  $$(){
  return $A(arguments).map(function(expression) {
        return expression.strip().split(/\s+/).inject([null], function(results, expr) {
          var selector = new Selector(expr);
          return results.map(selector.findElements.bind(selector)).flatten();
        });
   }).flatten();
}
// ----- Hide -----
function at_hide_all(){
 // c = document.getElementById(this["at_child"]);
  //$('.attach_menu_child').hide();
$$('.attach_menu_child').each(function(){if (Element.visible) Element.hide;});
  //$(this["at_child"]).invoke('hide');
  //c["at_timeout"] = setTimeout("document.getElementById('"+c.id+"').style.visibility = 'hidden'", 333);  
 // c["at_timeout"] = setTimeout('c.hide()', 333);
}
// ----- Click -----
function at_click(){
  p = document.getElementById(this["at_parent"]);
  c = document.getElementById(this["at_child" ]);
  if (c.style.visibility != "visible") at_show_aux(p.id, c.id);
  else $(c).hide();
  return false;
}
// ----- 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(parent, child, showtype, position, cursor){
  p = document.getElementById(parent);
  c = document.getElementById(child);
  p["at_parent"]     = p.id;
  c["at_parent"]     = p.id;
  p["at_child"]      = c.id;
  c["at_child"]      = c.id;
  p["at_position"]   = position;
  c["at_position"]   = position;
  c.style.position   = "absolute";  
  $(c).hide();
  if (cursor != undefined) p.style.cursor = cursor;
  switch (showtype){
    case "click":
      p.onclick     = at_click;
      p.onmouseout  = at_hide;
      c.onmouseover = at_show;
      c.onmouseout  = at_hide;
      break;
    case "hover":
      p.onmouseover = at_show;
      p.onmouseout  = at_hide;
      c.onmouseover = at_show;
      c.onmouseout  = at_hide;
      break;
  }
}