if (document.images)
{
	current_on = new Image();
	current_on.src = "images/current_on.gif";
	archives_on = new Image(); 
	archives_on.src = "images/archives_on.gif";
	symposium_on = new Image();
	symposium_on.src = "images/symposium_on.gif";
	about_on = new Image();
	about_on.src = "images/about_on.gif";
	masthead_on = new Image();
	masthead_on.src = "images/masthead_on.gif";
	subscriptions_on = new Image();
	subscriptions_on.src = "images/subscriptions_on.gif";
	submissions_on = new Image();
	submissions_on.src = "images/submissions_on.gif";
	contact_on = new Image();
	contact_on.src = "images/contact_on.gif";

	current_off = new Image();
	current_off.src = "images/current_off.gif";
	archives_off = new Image(); 
	archives_off.src = "images/archives_off.gif";
	symposium_off = new Image();
	symposium_off.src = "images/symposium_off.gif";
	about_off = new Image();
	about_off.src = "images/about_off.gif";
	masthead_off = new Image();
	masthead_off.src = "images/masthead_off.gif";
	subscriptions_off = new Image();
	subscriptions_off.src = "images/subscriptions_off.gif";
	submissions_off = new Image();
	submissions_off.src = "images/submissions_off.gif";
	contact_off = new Image();
	contact_off.src = "images/contact_off.gif";
}

function imgOn(img)
{
	if (document.images) 
	{
		document[img].src = eval(img + "_on.src");
	}
}

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