// Check for the correct DOM implementation.
	
var ieDOM = (document.all) ? 1 : 0;
var nsDOM = (document.layers) ? 1 : 0;
var ns6DOM = (!document.all && document.getElementById) ? 1 : 0;

// contentReady will be true, when all menus are prepared.
var contentLayersReady = 0;

function getContentLayer(layerIndex)
{
  var tCL;
	
	if (nsDOM)
	  tCL = eval('document.contentLayer'+ layerIndex);
	else if (ns6DOM)
	  tCL = document.getElementById('contentLayer' + layerIndex);
	else if (ieDOM)
		tCL = eval('contentLayer' + layerIndex);
		
  return tCL;
}

// NOTE: This should be called AFTER the content layer html has been laid out...
//       In other words, at the end of the page, or at the onLoad event.

function buildContentLayers()
{
  if (!nsDOM && !ieDOM && !ns6DOM) return;
	contentLayers = new Array();
	for (i = 0; i < totalContentLayers; i++)
		contentLayers[i] = getContentLayer(i);

	contentLayersReady = 1;
}

function show(ndx)
{
  contentLayers[ndx].className = 'collegelayers'; 

  for (i = 0; i < totalContentLayers; i++)
		if (i != ndx)
		  contentLayers[i].className = 'hidden';            			// hide all layers
}