var sw=1;

image=new Array(2);

image[1]="img/page_img1.jpg";
image[2]="img/page_img2.jpg";
image[3]="img/page_img3.jpg";

function picChg()

{

	setTimeout("picChg()",3000);

	var pic = document.getElementById('pic');

	pic.src=image[sw];

	sw=sw+1

	if (sw>3){sw=1;}

}