var rand1 = 0;
var useRand = 0;

images = new Array;
images[1] = new Image();
images[1].src = "images/ran1.jpg";
images[2] = new Image();
images[2].src = "images/ran2.jpg";
images[3] = new Image();
images[3].src = "images/ran3.jpg";
images[4] = new Image();
images[4].src = "images/ran4.jpg";
images[5] = new Image();
images[5].src = "images/ran5.jpg";
function swapPic() {
var imgnum = images.length - 1;
do {
var randnum = Math.random();
rand1 = Math.round((imgnum - 1) * randnum) + 1;
} while (rand1 == useRand);
useRand = rand1;
document.randimg.src = images[useRand].src;
}

function swapPic2() {
var imgnum = images.length - 1;
do {
var randnum = Math.random();
rand1 = Math.round((imgnum - 1) * randnum) + 1;
} while (rand1 == useRand);
useRand = rand1;
document.randimg.src = images[useRand].src;
}