var remember = new Array();
var remember2 = new Array();
var checkIt;

var DHTML = (document.getElementById || document.all || document.layers);

function showSubMenu(name,lvl,obj)
{
	if (!DHTML) return;
	checkUserInput();
	if (remember[lvl] && remember[lvl] == name) return;
	if (remember[lvl])
	{
		closeAll(lvl);
	}
	if (name)
	{
		var x = getObj(name);
		x.visibility = 'visible';
	}
	remember[lvl] = name;
	if (obj.parentNode) y = obj.parentNode;
	else if (obj.parentElement) y = obj.parentElement;
	else return;
	if (y.className) return;
	y.className = 'over';
	if (remember2[lvl]) remember2[lvl].className = '';
	remember2[lvl] = y;
}

function closeAll(lvl)
{
	for (i=remember.length - 1;i>=lvl;i--)
	{
		if (remember[i]) //IE4 Mac
		{
			var x = getObj(remember[i]);
			x.visibility = 'hidden';
		}
		remember[i] = null;
		if (remember2[i])
		{
			remember2[i].className = '';
			remember2[i] = null;
		}
	}

}

function checkUserInput()
{
	if (checkIt) clearTimeout(checkIt);
	checkIt = setTimeout('closeAll(1)',4000);
}

function getObj(name)
{
  if (document.getElementById)
  {
    return document.getElementById(name).style;
  }
  else if (document.all)
  {
    return document.all[name].style;
  }
  else if (document.layers)
  {
    return document.layers[name];
  }
  else return false;
}


// IMAGE PRELOADING
var preloaded = new Array();
function preload_images() {

    for (var i = 0; i < arguments.length; i++){

        preloaded[i] = document.createElement('img');

        preloaded[i].setAttribute('src',arguments[i]);

    };    

};

preload_images(
	'/images/layout/standard/navItem_over.gif',
	'/images/layout/standard/icon_close.jpg',
	'/images/layout/standard/specNav_links_over.gif',
	'/images/layout/standard/specNav_myimp_over.gif',
	'/images/layout/standard/specNav_photo_over.gif',
	'/images/layout/standard/specNav_staff_over.gif'
);

/* feature open/close toggle control */
function swap(targetId,buttonId){
  
	if (document.getElementById) {
		target = document.getElementById(targetId);
		buttonName = document.getElementById(buttonId);
	
		if (target.style.display == "block") {
			target.style.display = "none";
		} else {
			target.style.display = "block";
		}
	
		if (target.style.display == "none") {
			buttonName.src = "/images/layout/standard/icon_open.jpg";
		} else  {
			buttonName.src = "/images/layout/standard/icon_close.jpg";
		}
		
	}
	
}