function RandomImage(){
 var images = new Array();
images[0] = "<img src='images/andrea-arden.jpg' width='183' height='121' alt='Andrea Arden'/>";
images[1] = "<img src='images/mystery.jpg'  width='183' height='121' alt='Mystery' />";
images[2] = "<img src='images/orijen.jpg' width='183' height='121' alt='Orijen'/>";
images[3] = "<img src='images/wellness-small.jpg' width='183' height='121' alt='Wellness'/>";




index = Math.floor(Math.random() * images.length);
document.write(images[index] + "\n");
}


function RandomImage_big(){
var images = new Array();

images[1] = "<a href='http://www.petnetdirect.com/page/1/CTGY/DTGreenies'><img src='images/home_greenies.jpg' width='230' height='173' alt='Greenies'/></a>";

images[0] = "<a href='http://www.petnetdirect.com/page/1/CTGY/DogsGoneSmart'><img src='images/home_centerAd_DGSBeds.jpg' width='230' height='173' alt='Dog Gone Smart Beds'/></a>";

images[2] = "<a href='http://www.petnetdirect.com/page/1/CTGY/Earthborn'><img src='images/home_centerAd_earthborn.jpg' width='230' height='173' alt=Earthborn'/></a>";

index = Math.floor(Math.random() * images.length);

document.write(images[index]);
}