var NS4 = (document.layers) ? 1 : 0;
var IE = (document.all) ? 1 : 0;
var DOM = ((document.getElementById)&&!IE) ? 1 : 0;
	
function navOn(navId) 
{
	clearNavs() ;

	if (IE) 
	{
		document.all['mainNav_'+navId].className = "navOn_"+navId;
		document.all['navText'].className = "navOn_"+navId;
		document.all.navText.innerHTML = document.all["navText_"+navId].innerHTML;
	}
	else if (NS4) 
	{
		//
	}
	else if (DOM) 
	{
		document.getElementById('mainNav_'+navId).className="navOn_"+navId;
		document.getElementById('navText').className="navOn_"+navId;
		document.getElementById('navText').innerHTML = document.getElementById('mainNav_'+navId).innerHTML;
	}
}


function clearNavs() 
{
	for (i=0; i<navElements; i++)
	{
		if (IE) 
			document.all['mainNav_'+i].className='navOff';

		else if (NS4)
		{
			//
		}

		else if (DOM) 
			document.getElementById('mainNav_'+i).className="navOff";
	}
}

function imgSwapOn(imgName)
{
	if (document.images != null)
		document [imgName].src = eval(imgName + "_2.src");
}

function imgSwapOff(imgName)
{
	if (document.images != null)
		document [imgName].src = eval(imgName + "_1.src");
}