$Ads = array (
"http://www.germanshepherdhome.net/testadbanner1.jpg",
"http://www.germanshepherdhome.net/testadbanner2.jpg",
"http://www.germanshepherdhome.net/testadbanner3.jpg"
);
$adNum = mt_rand(0, count($Ads)-1);
$body = <<<EOF
<img src="{$Ads[$adNum]}" />
EOF;