// You expressly acknowledge and agree that use of this code is at your own risk.

// ***** Popup Control *********************************************************

// ***** at_show_aux *****

function at_show_auxup(parent, child)
{
  var p = document.getElementById(parent);
  var c = document.getElementById(child );

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


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

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

// ***** at_show *****

function at_showup()
{
  var p = document.getElementById(this["at_parent"]);
  var c = document.getElementById(this["at_child" ]);
  
  at_show_auxup(p.id, c.id);
  clearTimeout(c["at_timeout"]);
}

// ***** at_hide *****

function at_hideup()
{
  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'", 300);	
  
}

// ***** at_click *****

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

  if (c.style.visibility != "visible") at_show_auxup(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_attachup(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_clickup;
      p.onmouseout  = at_hideup;
      c.onmouseover = at_showup;
      c.onmouseout  = at_hideup;
      break;
    case "hover":
      p.onmouseover = at_showup;
      p.onmouseout  = at_hideup;
      c.onmouseover = at_showup;
      c.onmouseout  = at_hideup;
      break;
  }
}