image1 = new Image();
image1.src = "images/carpenters_x.gif";

image2 = new Image();
image2.src = "images/timbermen_x.gif";

image3 = new Image();
image3.src = "images/coredrillers_x.gif";

image4 = new Image();
image4.src = "images/hodhoist_x.gif";