// JavaScript Document
var IE 		=   !!(window.attachEvent && navigator.userAgent.indexOf('Opera') === -1);
var Opera 	= 	navigator.userAgent.indexOf('Opera') > -1;
var WebKit	=	navigator.userAgent.indexOf('AppleWebKit/') > -1;
var Gecko	=  	navigator.userAgent.indexOf('Gecko') > -1 &&  navigator.userAgent.indexOf('KHTML') === -1;
var MobileSafari = !!navigator.userAgent.match(/Apple.*Mobile.*Safari/);
var minusval = (WebKit) ? -7 : 0;
function at_show_aux(parent, child)
{
  var p = document.getElementById(parent);
  var c = document.getElementById(child );
  var top  = (c["at_position"] == "y") ? p.offsetHeight+minusval : 0;
  var left = (c["at_position"] == "x") ? p.offsetWidth +minusval : 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";
}
function at_show()
{
  var p = document.getElementById(this["at_parent"]);
  var c = document.getElementById(this["at_child" ]);
  at_show_aux(p.id, c.id);
  clearTimeout(c["at_timeout"]);
}
// ***** at_hide *****
function at_hide()
{
  var p = document.getElementById(this["at_parent"]);
  var c = document.getElementById(this["at_child" ]);
  c["at_timeout"] = setTimeout("document.getElementById('"+c.id+"').style.visibility = 'hidden'", 0);
}
// ***** at_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;
}
// ***** at_attach *****
// PARAMETERS:
// parent   - id of the parent html element
// child    - id of the child  html element that should be droped down
// showtype - "click" = drop down child html element on mouse click
//            "hover" = drop down child html element on mouse over
// position - "x" = display the child html element to the right
//            "y" = display the child html element below
// cursor   - omit to use default cursor or specify CSS cursor name
function at_attach(parent, child, showtype, position, cursor)
{
  var p = document.getElementById(parent);
  var 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.style.visibility = "hidden";
  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;
  }

}