if (document.images)
	{
	var b4off = new Image();
	b4off.src = "b4off.gif";
	var b4on = new Image();
	b4on.src = "b4on.gif";
	var b3off = new Image();
	b3off.src = "b3off.gif";
	var b3on = new Image();
	b3on.src = "b3on.gif";
	var b6off = new Image();
	b6off.src = "b6off.gif";
	var b6on = new Image();
	b6on.src = "b6on.gif";
	var b14off = new Image();
	b14off.src = "b14off.gif";
	var b14on = new Image();
	b14on.src = "b14on.gif";
	var b10off = new Image();
	b10off.src = "b10off.gif";
	var b10on = new Image();
	b10on.src = "b10on.gif";
	var b12off = new Image();
	b12off.src = "b12off.gif";
	var b12on = new Image();
	b12on.src = "b12on.gif";
	var b8off = new Image();
	b8off.src = "b8off.gif";
	var b8on = new Image();
	b8on.src = "b8on.gif";
	var b13off = new Image();
	b13off.src = "b13off.gif";
	var b13on = new Image();
	b13on.src = "b13on.gif";
	var b5off = new Image();
	b5off.src = "b5off.gif";
	var b5on = new Image();
	b5on.src = "b5on.gif";
	var b7off = new Image();
	b7off.src = "b7off.gif";
	var b7on = new Image();
	b7on.src = "b7on.gif";

	
	}

//generic function to change the navigation rollover buttons
function act(imgName)
	{
	if (document.images)
		document.images[imgName].src = eval(imgName + "on.src");
	}
//generic function to reverse the navigation rollover buttons
function inact(imgName)
	{
	if (document.images)
		document.images[imgName].src = eval(imgName + "off.src");
	}