var but1 = new Image();
but1.src = "gfx/news2.jpg";

var but2 = new Image();
but2.src = "gfx/portfolio2.jpg";

var but3 = new Image();
but3.src = "gfx/about2.jpg";

var but4 = new Image();
but4.src = "gfx/contact2.jpg";