function image() {};
image = new image();
number = 0;
image[number++] = "<a href='http://www.parkstonrainbowmotel.com/'><img src='images/prad.gif'></a> <a href='http://www.gfadvertising.com'><img src='images/gfad.gif'></a> <a href='#'><img src='images/ad2.gif'></a>"
image[number++] = "<a href='http://www.gfadvertising.com'><img src='images/gfad.gif'></a><a href='http://www.parkstonrainbowmotel.com/'><img src='images/prad.gif'></a> <a href='#'><img src='images/ad2.gif'></a>"
image[number++] = "<a href='#'><img src='images/ad2.gif'></a><a href='http://www.gfadvertising.com'><img src='images/gfad.gif'></a><a href='http://www.parkstonrainbowmotel.com/'><img src='images/prad.gif'></a>"



increment = Math.floor(Math.random() * number);
document.write(image[increment]);