(new Image()).src="images/1.jpg";
(new Image()).src="images/1_tn.jpg";
(new Image()).src="images/1_bw.jpg";
(new Image()).src="images/2.jpg";
(new Image()).src="images/2_tn.jpg";
(new Image()).src="images/2_bw.jpg";
(new Image()).src="images/3.jpg";
(new Image()).src="images/3_tn.jpg";
(new Image()).src="images/3_bw.jpg";
(new Image()).src="images/4.jpg";
(new Image()).src="images/4_tn.jpg";
(new Image()).src="images/4_bw.jpg";
(new Image()).src="images/5.jpg";
(new Image()).src="images/5_tn.jpg";
(new Image()).src="images/5_bw.jpg";
(new Image()).src="images/6.jpg";
(new Image()).src="images/6_tn.jpg";
(new Image()).src="images/6_bw.jpg";

currImage = 1;

function photoOver(num) {
	if (currImage != num) {
		document.getElementById(num).src = "images/"+num+"_tn.jpg";
		document.getElementById(currImage).src = "images/"+currImage+"_bw.jpg";
		document.getElementById("main").src = "images/"+num+".jpg";
		currImage = num;
	}
}