function on(imgname)
{
        document.images[imgname].src = eval(imgname + "_on.src");
}

function off(imgname)
{
	document.images[imgname].src = eval(imgname + "_off.src");
}


function main_on(imgname)
{
	document.images['main'].src = eval("main_" + imgname + "_on.src");
}

function main_off()
{
	document.images['main'].src = 'pic/start.jpg';	
}

if (document.images)
{

	var one_off = new Image();
	one_off.src = "pic/menu/one_off.jpg";
	var two_off = new Image();
	two_off.src = "pic/menu/two_off.jpg";
	var three_off = new Image();
	three_off.src = "pic/menu/three_off.jpg";
	var four_off = new Image();
	four_off.src = "pic/menu/four_off.jpg";
	var five_off = new Image();
	five_off.src = "pic/menu/five_off.jpg";
	var six_off = new Image();
	six_off.src = "pic/menu/six_off.jpg";
	
	
	
	var one_on = new Image();
	one_on.src = "pic/menu/one_on.jpg";
	var two_on = new Image();
	two_on.src = "pic/menu/two_on.jpg";
	var three_on = new Image();
	three_on.src = "pic/menu/three_on.jpg";
	var four_on = new Image();
	four_on.src = "pic/menu/four_on.jpg";
	var five_on = new Image();
	five_on.src = "pic/menu/five_on.jpg";
	var six_on = new Image();
	six_on.src = "pic/menu/six_on.jpg";

}