// 分页函数
// amount 记录总数
// current 当前页
// size 每页记录数
// get 需要通过get继续传递的参数，前面不要带?
// 返回一个供查询和smarty产生分页信息的数组
private function paging($amount,$current=1,$size=5,$get='') {
	$paging = array();
	if($amount == 0)
		return $paging;
	$paging[get] = $get;
	$paging[size] = $size;
	$paging[amount] = $amount;
	$paging[no] = $current;
	$paging[total] = ceil($paging[amount] / $paging[size]);
	if($paging[no] != "" && is_numeric($paging[no])) {
		$paging[no] = intval($paging[no]);
	} else {
		$paging[no] = 1;
	}
	if($paging[no] < 1)
		$paging[no] = 1;
	if($paging[no] > $paging[total])
		$paging[no] = $paging[total];
	$paging[start] = $paging[size] * ($paging[no] - 1);
	$paging[button] = array();
	if($paging[total] != 1) {
		$paging[listNo] = min($paging[total],5);
		for($i=0;$i<$paging[listNo];$i++) {
			$paging[button][] = $paging[no] - 2 + $i;
		}
		$paging[offset] = 0;
		foreach($paging[button] as $tmp) {
			if($tmp < 1) {
				$paging[offset]++;
			}
			if($tmp > $paging[total]) {
				$paging[offset]--;
			}
		}
		for($i=0;$i<count($paging[button]);$i++) {
			$paging[button][$i] = $paging[button][$i] + $paging[offset];
		}
	}
	return $paging;
}