preload_1 = new Image();
preload_1.src = "images/arrow_out.gif";
preload_2 = new Image();
preload_2.src = "images/arrow_on.gif";
preload_3 = new Image();
preload_3.src = "images/arrow_active.gif";
preload_4 = new Image();
preload_4.src = "images/px_trans.gif";
preload_5 = new Image();
preload_5.src = "images/back-logo.gif";
preload_6 = new Image();
preload_6.src = "images/back-left.gif";
preload_7 = new Image();
preload_7.src = "images/arrow_up.gif";