// JavaScript Document
var navigationController = {
	selectMain: function(menuItem) {
		// this.navigationSelect('navigation', menuItem);
	},

	selectSub: function(menuItem) {
		// this.navigationSelect('subnavigation', menuItem);
	},
	
	navigationSelect: function(navElement, menuItem) {
		// Manage main navigation
		
		if (navElement == 'navigation') {
			var theList = document.getElementById(navElement);
			var listElements = theList.getElementsByTagName('li');
			var i;
			
			// If the current element contains the 
			// id of the desired pre-selection,
			// change its class and also the <A>
			// node that it contains
			
			for (i=0; i< listElements.length; i++) {
				if (listElements[i].id == menuItem) {
					listElements[i].className = 'selected';
					
					var linkElements = listElements[i].getElementsByTagName('a');
					linkElements[0].className = 'selected';
				}
			}
		}
		
		// Manage subnavigation major
		
		else {
			var listElement = document.getElementById(menuItem);
			var linkElements = listElement.getElementsByTagName('a');
			linkElements[0].className = 'selected';
		}
	}
}

/* swapBannerImage()
********************
Swaps a banner image.
*/
function swapBannerImage(filename) {
   var theImage = document.getElementById('bannerImage');
	theImage.src = '/rhoi/images/' + filename;
	
	return;
}

/* displayDiv()
***************
*/
function displayDiv(id) {
   var theDiv = document.getElementById(id);

   if (theDiv.style.display == 'none') {
      showDiv(id);
   }
   else {
      hideDiv(id);
   }
}


/* showDiv()
************
*/
function showDiv(id) {
   var theDiv = document.getElementById(id);

   theDiv.style.display = 'block';
}


/* hideDiv()
************
*/
function hideDiv(id) {
   var theDiv = document.getElementById(id);

   theDiv.style.display = 'none';
}