function get_random()
{

var ranNum= Math.floor(Math.random()*1);
return ranNum;
}
var whichImg=get_random();

function show_image() {

var img=new Array(1)
img[0]="<a href='/product.php/345/abs_king_pro_delux'><img src='images/viatv-new-479.gif' border='0' /></a> ";

document.write(img[whichImg]);
}