/* navigation */

var idNavigation = 'navigation';

navHover = function()
{
  var oNav = document.getElementById(idNavigation);
  if(oNav)
  {
    var navEls = oNav.getElementsByTagName('LI');
    for(var i = 0; i < navEls.length; i++)
    {
      navEls[i].onmouseover = function()
      {
        this.className += ' hover';
      }
      navEls[i].onmouseout = function()
      {
        this.className = this.className.replace(new RegExp(' hover\\b'), '');
      }
    }
  }
}

navAccessible = function()
{
  var oNav = document.getElementById(idNavigation);
  if(oNav)
  {
  	var navEls = oNav.getElementsByTagName('A');
  	for (var i = 0; i < navEls.length; i++)
    {
  		navEls[i].onfocus = function()
      {
  			this.className += (this.className.length > 0? ' ' : '') + 'focus'; //a:focus
  			this.parentNode.className += (this.parentNode.className.length > 0 ? ' ': '') + 'hover'; //li < a:focus
  			if(this.parentNode.parentNode.parentNode.nodeName == 'LI')
        {
  				this.parentNode.parentNode.parentNode.className += (this.parentNode.parentNode.parentNode.className.length > 0? ' ': '') + 'hover'; //li < ul < li < a:focus
  				if(this.parentNode.parentNode.parentNode.parentNode.parentNode.nodeName == 'LI')
          {
  					this.parentNode.parentNode.parentNode.parentNode.parentNode.className += (this.parentNode.parentNode.parentNode.parentNode.parentNode.className.length > 0? ' ': '') + 'hover'; //li < ul < li < ul < li < a:focus
    				if(this.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.nodeName == 'LI')
    					this.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.className += (this.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.className.length > 0? ' ': '') + 'hover'; //li < ul < li < ul < li < ul < li < a:focus
          }
  			}
  		}
  		navEls[i].onblur = function()
      {
  			this.className = this.className.replace(new RegExp('( ?|^)focus\\b'), '');
  			this.parentNode.className = this.parentNode.className.replace(new RegExp('( ?|^)hover\\b'), '');
  			if(this.parentNode.parentNode.parentNode.nodeName == 'LI')
        {
  				this.parentNode.parentNode.parentNode.className = this.parentNode.parentNode.parentNode.className.replace(new RegExp('( ?|^)hover\\b'), '');
  				if(this.parentNode.parentNode.parentNode.parentNode.parentNode.nodeName == 'LI')
          {
  					this.parentNode.parentNode.parentNode.parentNode.parentNode.className = this.parentNode.parentNode.parentNode.parentNode.parentNode.className.replace(new RegExp('( ?|^)hover\\b'), '');
    				if(this.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.nodeName == 'LI')
    					this.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.className = this.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.className.replace(new RegExp('( ?|^)hover\\b'), '');
          }
  			}
  		}
//alert(navEls[i].onfocus + '\n\n' + navEls[i].onblur);
    }
	}
}

// only ie needs the navHover script. all need the accessibility script...
if(window.addEventListener)
  window.addEventListener('load', navAccessible, false); // gecko, safari, konqueror and standard
else if(document.addEventListener)
  document.addEventListener('load', navAccessible, false); // opera 7
else if(window.attachEvent)
{ // win/ie
	window.attachEvent('onload', navHover);
	window.attachEvent('onload', navAccessible);
}
else
{ // mac/ie5
	if(typeof window.onload == 'function')
  {
		var existing = onload;
		window.onload = function()
    {
			existing();
			navHover();
			navAccessible();
		}
	}
  else
  {
		window.onload = function()
    {
			navHover();
			navAccessible();
		}
	}
}