function at_show_aux(parent, child)
{
  var p = document.getElementById(parent);
  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";
}

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

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'", 10);
}

// ***** 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;
  }
}



function showmenu(id)
{
document.getElementById('menu_'+id).style.display="block";
}
function hidemenu()
{
	if(dixuong!=1)hidemenu_ok();
//var timeout;
//clearTimeout(timeout);
//timeout=setTimeout('hidemenu_ok()',110);
}

function hidemenu_ok()
{
document.getElementById('menu_1').style.display="none";
document.getElementById('menu_2').style.display="none";
}

function clear_time_out()
{
//alert('a');
}



function overthis(ele)
{
	ele.style.cursor = 'pointer';
	ele.style.backgroundPosition="bottom";
	if(	ele.className == 'tab')
	{
		ele.className = 'hover_tab'
	}
} 

function outthis(ele)
{
	id=((ele.id).substr(3,1));
	if(	ele.className == 'hover_tab')
	{
		ele.className = 'tab'
	}
	if(out!=id)ele.style.backgroundPosition="top";

} 
function change_tab(ele,tabele)
{
	document.getElementById("tab0").style.backgroundPosition="top";
	document.getElementById("tab1").style.backgroundPosition="top";
	document.getElementById("tab2").style.backgroundPosition="top";
	document.getElementById("tab3").style.backgroundPosition="top";
	tabele.style.backgroundPosition="bottom";
	out=ele;
	var arr = new Array(); 
	var elems = document.getElementsByTagName("*");
	for(var i = 0; i < elems.length; i++)
	{
	  var elem = elems[i];
	  var id = elem.getAttribute("id");
	  if (navigator.userAgent.indexOf("MSIE")>=0)
		{ var cls = elem.getAttribute("className");}
		else
		{ var cls = elem.getAttribute("class");	}
	  if(cls == 'current_tab')
	  {
		arr[arr.length] = id;
		 elem.className="tab";
	  }
	  if(cls == 'divtab')
	  {
		document.getElementById(id).style.display="none";
	  }
	}
	
	document.getElementById('hidden'+ele).style.display="block";
	tabele.className = 'current_tab';
} 




function overthis_2(ele)
{
	ele.style.cursor = 'pointer';
	if(	ele.className == 'tab_2')
	{
		ele.className = 'hover_tab_2'
	}
} 

function outthis_2(ele)
{
	if(	ele.className == 'hover_tab_2')
	{
		ele.className = 'tab_2'
	}
} 
function change_tab_2(ele,tabele)
{
	var arr = new Array(); 
	var elems = document.getElementsByTagName("*");
	for(var i = 0; i < elems.length; i++)
	{
	  var elem = elems[i];
	  var id = elem.getAttribute("id");
	  if (navigator.userAgent.indexOf("MSIE")>=0)
		{ var cls = elem.getAttribute("className");}
		else
		{ var cls = elem.getAttribute("class");	}
	  if(cls == 'current_tab_2')
	  {
		arr[arr.length] = id;
		 elem.className="tab_2";
	  }
	  if(cls == 'divtab_2')
	  {
		document.getElementById(id).style.display="none";
	  }
	}
	
	document.getElementById(ele).style.display="block";
	tabele.className = 'current_tab_2'
}