function preload() {
if (document.images) {
            p1 = new Image();      
            p1.src = "images/op8_01.gif"; 
            p3 = new Image();      
            p3.src = "images/op8_03.gif";
						p4 = new Image();
						p4.src = "images/op8_04.gif";
						p6 = new Image();
						p6.src = "images/op8_06.gif";
						p7 = new Image();
						p7.src = "images/op8_07.gif";
						p9 = new Image();
						p9.src = "images/op8_09.gif";
						p10 = new Image();
						p10.src = "images/op8_10.gif";
						p16 = new Image();
						p16.src = "images/op8_16.gif";
						p17 = new Image();
						p17.src = "images/op8_17.gif";
						p18 = new Image();
						p18.src = "images/op8_18.gif";
						p19 = new Image();
						p19.src = "images/op8_19.gif";
						p20 = new Image();
						p20.src = "images/op8_20.gif";
						p21 = new Image();
						p21.src = "images/op8_21.gif";
						p15 = new Image();
						p15.src = "images/op9_15.jpg";
						p29 = new Image();
						p29.src = "images/op6_04d.gif";
						p22 = new Image();
						p22.src = "images/op6_01.gif";
						p23 = new Image();
						p23.src = "images/op6_03a.gif";
						p24 = new Image();
						p24.src = "images/op6_03b.gif";
						p25 = new Image();
						p25.src = "images/op6_03c.gif";
						p26 = new Image();
						p26.src = "images/op6_03d.gif";
						p27 = new Image();
						p27.src = "images/op6_03e.gif";
						p28 = new Image();
						p28.src = "images/op6_04b.gif";
						p30 = new Image();
						p30.src = "images/op6_05a.gif";
						p31 = new Image();
						p31.src = "images/op6_05b.gif";
						p32 = new Image();
						p32.src = "images/op6_05c.gif";
						p33 = new Image();
						p33.src = "images/op6_05d.gif";
						p34 = new Image();
						p34.src = "images/op6_05e.gif";
}}