var navTimer = null;
var nav_to_hide = null;
var el_to_hide = null;
var i_to_hide = null;
var menu_x_offset = 0;
var menu_y_offset = 19;
var bgcolor = null;
var defaultlay = null;


function show_nav_special(obj, lay){
  var newX = findPosX(obj) + menu_x_offset;
  var newY = findPosY(obj) + menu_y_offset;
  var el = document.getElementById(lay);	
 
  el.style.left = newX - (el.offsetWidth / 2) + (obj.offsetWidth / 2) + 'px';
  el.style.top = newY + 'px' ;
  
  show_nav(lay);
}

function show_nav(lay){
	if (nav_to_hide != lay){
		do_hide(nav_to_hide);
	}
	var el = document.getElementById(lay);
	el.style.visibility='';
	clearTimeout(navTimer);
	navTimer = null;
}

function hide_nav(lay, el, i){
	nav_to_hide = lay;
	el_to_hide = el;
	i_to_hide = i;
	navTimer = setTimeout("timeout_hide('"+lay+"')", 500);
}

function timeout_hide(lay){
	do_hide(lay);
	if (defaultlay != null){
		show_nav(defaultlay);
		nav_to_hide = defaultlay;
	}
	
}

function do_hide(lay){
	if ((i_to_hide != null) && (el_to_hide != null)){
		swap_image(el_to_hide,i_to_hide);
	}
	if (lay != null){
		var el = document.getElementById(lay);
		var sn = document.getElementById('sub_nav');
		el.style.visibility='hidden';
	}
	nav_to_hide = null;
	el_to_hide = null;
	i_to_hide = null;
}

function findPosX(obj)
{
	var curleft = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)
		curleft += obj.x;
	return curleft;
}

function findPosY(obj)
{
	var curtop = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curtop += obj.offsetTop
			obj = obj.offsetParent;
		}
	}
	else if (obj.y)
		curtop += obj.y;
	return curtop;
}

function swap_image(el, i){
	var obj = document.getElementById(el);
	obj.src = i;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}