if (document.images)	{
	//INTERIOR NAVIGATION IMAGES
	var about_on = new Image();
	about_on.src = "images/about-on.gif";
	var about_off = new Image();
	about_off.src = "images/about-off.gif";

	var companies_on = new Image();
	companies_on.src = "images/companies-on.gif";
	var companies_off = new Image();
	companies_off.src = "images/companies-off.gif";

	var products_on = new Image();
	products_on.src = "images/products-on.gif";
	var products_off = new Image();
	products_off.src = "images/products-off.gif";

	var resource_on = new Image();
	resource_on.src = "images/resource-on.gif";
	var resource_off = new Image();
	resource_off.src = "images/resource-off.gif";

	var contactus_on = new Image();
	contactus_on.src = "images/contactus-on.gif";
	var contactus_off = new Image();
	contactus_off.src = "images/contactus-off.gif";
}
	
function imgOn(imgName)
{
	if (document.images)
	{
			document[imgName].src = eval(imgName + '_on.src');
	}
}

function imgOff(imgName)
{
	if (document.images)
	{
			document[imgName].src = eval(imgName + '_off.src');
	}
}

function imgDefault(imgName){
	if (imgName != "none" && document.images[imgName]!= null){ 

		document[imgName].src = eval(imgName + '_on.src');	
		
	}
}