if (document.images)
{
	//Top Menu Bar Graphics
	button_home_up = new Image();
	button_home_up.src = "images/button_home_up.png";
	
	button_home_down = new Image();
	button_home_down.src = "images/button_home_down.png";
	
	button_about_up = new Image();
	button_about_up.src = "images/button_about_up.png";
	
	button_about_down = new Image();
	button_about_down.src = "images/button_about_down.png";
	
	button_services_up = new Image();
	button_services_up.src = "images/button_services_up.png";
	
	button_services_down = new Image();
	button_services_down.src = "images/button_services_down.png";
	
	button_contact_up = new Image();
	button_contact_up.src = "images/button_contact_up.png";
	
	button_contact_down = new Image();
	button_contact_down.src = "images/button_contact_down.png";
	
	button_ideas_up = new Image();
	button_ideas_up.src = "images/button_ideas_up.png";
	
	button_ideas_down = new Image();
	button_ideas_down.src = "images/button_ideas_down.png";
	
	button_learning_up = new Image();
	button_learning_up.src = "images/button_learning_up.jpg";
	
	button_learning_down = new Image();
	button_learning_down.src = "images/button_learning_down.jpg";
	
	button_ec_up = new Image();
	button_ec_up.src = "images/button_ec_up.jpg";
	
	button_ec_down = new Image();
	button_ec_down.src = "images/button_ec_down.jpg";
	
	button_media_up = new Image();
	button_media_up.src = "images/button_media_up.jpg";
	
	button_media_down = new Image();
	button_media_down.src = "images/button_media_down.jpg";

}

function rollOn (imgName)
{
	if (document.images)
	{
		imgOn = eval (imgName + "_up.src");
		document[imgName].src = imgOn;
	}
}

function rollOff (imgName)
{
	if (document.images)
	{
		imgOff = eval (imgName + "_down.src");
		document[imgName].src = imgOff;
	}
}