function GetFirstImg($arcid){
global $dsql;
$query= "SELECT body FROM `dede_addonarticle` where aid='$arcid'";
$row = $dsql->GetOne($query);
$preg = "/<img.*?src=['"](.+?)['"].*?>/i";
preg_match_all($preg, $row['body'], $match);
//print_r($match);
return $match[1][0];
}