k = new Image();
k.src = "./pic/k.jpg";
k_2 = new Image();
k_2.src = "./pic/k_2.jpg";

o1 = new Image();
o1.src = "./pic/o1.jpg";
o1_2 = new Image();
o1_2.src = "./pic/o1_2.jpg";

ix = new Image();
ix.src = "./pic/x.jpg";
ix_2 = new Image();
ix_2.src = "./pic/x_2.jpg";

h = new Image();
h.src = "./pic/h.jpg";
h_2 = new Image();
h_2.src = "./pic/h_2.jpg";

o2 = new Image();
o2.src = "./pic/o2.jpg";
o2_2 = new Image();
o2_2.src = "./pic/o2_2.jpg";

l = new Image();
l.src = "./pic/l.jpg";
l_2 = new Image();
l_2.src = "./pic/l_2.jpg";

t = new Image();
t.src = "./pic/t.jpg";
t_2 = new Image();
t_2.src = "./pic/t_2.jpg";

function swap(nr,obj) {
     window.document.images[nr].src = obj.src;
}