function newImage(arg) 
		{if (document.images) 
		{rslt = new Image();
		rslt.src = arg;
		return rslt;}}

function changeImages() 
	{if (document.images && (preloadFlag == true)) 
	{for (var i=0; i<changeImages.arguments.length; i+=2) 
	{document[changeImages.arguments[i]].src = changeImages.arguments[i+1];}}}

var preloadFlag = false;
function preloadImages() 
	{if (document.images) 
		{Kn1_over = newImage("images/Kn1_over.gif");
		Kn1_down = newImage("images/Kn1_down.gif");
		Kn2_over = newImage("images/Kn2_over.gif");
		Kn2_down = newImage("images/Kn2_down.gif");
		Kn3_over = newImage("images/Kn3_over.gif");
		Kn3_down = newImage("images/Kn3_down.gif");
		Kn4_over = newImage("images/Kn4_over.gif");
		Kn4_down = newImage("images/Kn4_down.gif");
		Kn5_over = newImage("images/Kn5_over.gif");
		Kn5_down = newImage("images/Kn5_down.gif");
		Kn6_over = newImage("images/Kn6_over.gif");
		Kn6_down = newImage("images/Kn6_down.gif");
		Kn7_over = newImage("images/Kn7_over.gif");
		Kn7_down = newImage("images/Kn7_down.gif");
		Kn_V1_over = newImage("images/Kn_V1_2_over.gif");
		Kn_V2_over = newImage("images/Kn_V2_2_over.gif");
		Kn_V3_over = newImage("images/Kn_V2_over.gif");
		Kn_V4_over = newImage("images/Kn_V3_over.gif");
		preloadFlag = true;	}}