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function pageft($totle,$displaypg=20,$url=''){
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global $page,$firstcount,$pagenav,$_SERVER;
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$GLOBALS["displaypg"]=$displaypg;
if(!$page) $page=1;
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if(!$url){ $url=$_SERVER["REQUEST_URI"];}
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$url_query=ereg_replace("(^|&)page=$page","",$url_query);
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if($url_query) $url.="&page"; else $url.="page";
}else {
$url.="?page";
}
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$lastpg=ceil($totle/$displaypg); //×îºóÒ³£¬Ò²ÊÇ×ÜÒ³Êý
$page=min($lastpg,$page);
$prepg=$page-1; //ÉÏÒ»Ò³
$nextpg=($page==$lastpg ? 0 : $page+
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