// xDef, Copyright 2001-2007 Michael Foster (Cross-Browser.com)
// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL

function xDef()
{
  for(var i=0; i<arguments.length; ++i){if(typeof(arguments[i])=='undefined') return false;}
  return true;
}

function xGetElementById(e)
{	
//debugger
  if(typeof(e)=='string') {			
    if(document.getElementById) e=document.getElementById(e);
    else if(document.all) e=document.all[e];
    else e=null;
  }
  return e;
}

function xGetElementsByClassName(c,p,t,f)
{
  var r = new Array();
  var re = new RegExp("(^|\\s)"+c+"(\\s|$)");
//  var e = p.getElementsByTagName(t);
  var e = xGetElementsByTagName(t,p); // See xml comments.
  for (var i = 0; i < e.length; ++i) {
    if (re.test(e[i].className)) {
      r[r.length] = e[i];
      if (f) f(e[i]);
    }
  }
  return r;
}

function xGetElementsByTagName(t,p)
{
  var list = null;
  t = t || '*';
  p = p || document;
  if (typeof p.getElementsByTagName != 'undefined') { // DOM1
    list = p.getElementsByTagName(t);
    if (t=='*' && (!list || !list.length)) list = p.all; // IE5 '*' bug
  }
  else { // IE4 object model
    if (t=='*') list = p.all;
    else if (p.all && p.all.tags) list = p.all.tags(t);
  }
  return list || new Array();
}


/*******************************************************************************************/
//create cookie
function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

//read cookie
function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

//Set display ON OFF navBar
function setDisplay() {	
	var m = "0px";
 var navBar = xGetElementById('navBar');
 navBar.style.display = "none";
 var content = xGetElementById('content');
 content.style.marginLeft = m;
	var td = xGetElementsByClassName('middle');   
  for (i = 0; i < td.length; ++i) {
    td[i].style.backgroundImage = "none";
  }
	bd = xGetElementsByTagName('body');
	for (i = 0; i < bd.length; ++i) {
    bd[i].style.backgroundImage = "url(/css/img/body_bkg2.gif)";
  }
	}

//toggle navNar
function toggle()
{
  if (!enabled) return;
  var d, m, tdimg, navBar, content, td, bd, bdimg, i;
  if (betaVisible) {
    d = 'none';
    m = '0px';
				tdimg = 'none'
				bdimg = 'url(/css/img/body_bkg2.gif)';
  }
  else {
    d = 'block';
    m = '210px';
				tdimg = 'url(/css/img/td_middle_bkg.gif)';
				bdimg = 'url(/css/img/body_bkg1.gif)';
  }
  navBar = xGetElementById('navBar');
  navBar.style.display = d;
  content = xGetElementById('content');
  content.style.marginLeft = m;
		td = xGetElementsByClassName('middle');   
  for (i = 0; i < td.length; ++i) {
    td[i].style.backgroundImage = tdimg;
  }
		bd = xGetElementsByTagName('body');
		for (i = 0; i < bd.length; ++i) {
    bd[i].style.backgroundImage = bdimg;
  }
	//bottomImg = xGetElementById('bottomImg');
 // bottomImg.style.display = d;
		createCookie("navBar", d, 365);
  betaVisible = !betaVisible;
}


var enabled = false;

var cookie = readCookie("navBar");
var navVisibility = cookie ? cookie : "block";
	
var betaVisible = (navVisibility=="block")? true:false;