im_n = new Image()
im_n.src = "images/a1_on.gif";
im_f = new Image()
im_f.src = "images/a1.gif";

im_n = new Image()
im_n.src = "images/a1_on.gif";
im_f = new Image()
im_f.src = "images/a2.gif";

im_n = new Image()
im_n.src = "images/a1_on.gif";
im_f = new Image()
im_f.src = "images/a3.gif";

im_n = new Image()
im_n.src = "images/a1_on.gif";
im_f = new Image()
im_f.src = "images/a4.gif";

im_n = new Image()
im_n.src = "images/a1_on.gif";
im_f = new Image()
im_f.src = "images/a5.gif";

im_n = new Image()
im_n.src = "images/a1_on.gif";
im_f = new Image()
im_f.src = "images/a6.gif";

im_n = new Image()
im_n.src = "images/a1_on.gif";
im_f = new Image()
im_f.src = "images/a7.gif";


function but(img, fun)
{
	if(fun)
	{
		img.src = im_n.src;
	}
	else
	{
		img.src = im_f.src;
	}
}