diff --git a/include/function.php b/include/function.php
index 1946798..fe932de 100644
--- a/include/function.php
+++ b/include/function.php
@@ -11,6 +11,7 @@ function dstrpos($string, $arr) {
 	}
 	return false;
 }
+//判断移动端
 function checkmobile() {
 	$useragent = strtolower($_SERVER['HTTP_USER_AGENT']);
 	$ualist = array('android', 'midp', 'nokia', 'mobile', 'iphone', 'ipod', 'blackberry', 'windows phone');
@@ -70,6 +71,7 @@ function authcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {
 		return $keyc . str_replace('=', '', base64_encode($result));
 	}
 }
+//CDN
 function cdnpublic($cdnpublic) {
 	if(empty($cdnpublic)) {
 		return '.';
@@ -77,12 +79,14 @@ function cdnpublic($cdnpublic) {
 		return $cdnpublic.$conf['version'];
 	}
 }
+//获取协议和域名
 function siteurl() {
 	$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
 	$domainName = $_SERVER['HTTP_HOST'];
 	return $protocol . $domainName;
 }
 $background = $conf["background"];
+//网站背景
 function background() {
 	if (empty($GLOBALS['background'])) {
 		if (file_exists(ROOT.'assets/img/background.jpg'))return '../assets/img/background.jpg'; else return '../assets/img/bing.php';
@@ -90,6 +94,7 @@ function background() {
 		return $GLOBALS['background'];
 	}
 }
+//程序更新
 function update() {
 	$update_host = 'cdn.lylme.com';
 	//程序更新服务器,请勿删除和修改，否则将导致无法接收版本更新和程序报错
@@ -100,9 +105,71 @@ function getver($ver) {
 	$vn = explode('.', str_replace('v', '', $ver));
 	return $vn[0] . sprintf("%02d", $vn[1]) . sprintf("%02d", $vn[2]);
 }
+//更新设置
 function saveSetting($k, $v) {
 	global $DB;
 	$v = daddslashes($v);
 	return $DB->query("UPDATE `lylme_config` SET `v` = '$v' WHERE `lylme_config`.`k` = '$k';");
 }
+//获取相对路径
+function get_urlpath($srcurl,$baseurl) {
+	if(empty($srcurl))return '';
+	$srcinfo = parse_url($srcurl);
+	if(isset($srcinfo['scheme'])) {
+		return $srcurl;
+	}
+	$baseinfo = parse_url($baseurl);
+	$url = $baseinfo['scheme'].'://'.$baseinfo['host'];
+	if(substr($srcinfo['path'], 0, 1) == '/') {
+		$path = $srcinfo['path'];
+	} else {
+		$path = dirname($baseinfo['path']).'/'.$srcinfo['path'];
+	}
+	$rst = array();
+	$path_array = explode('/', $path);
+	if(!$path_array[0]) {
+		$rst[] = '';
+	}
+	foreach ($path_array AS $key => $dir) {
+		if ($dir == '..') {
+			if (end($rst) == '..') {
+				$rst[] = '..';
+			} elseif(!array_pop($rst)) {
+				$rst[] = '..';
+			}
+		} elseif($dir && $dir != '.') {
+			$rst[] = $dir;
+		}
+	}
+	if(!end($path_array)) {
+		$rst[] = '';
+	}
+	$url .= implode('/', $rst);
+	if( !empty($srcinfo['query']) ) $url .= '?'.$srcinfo['query'];
+	return str_replace('\\', '/', $url);
+}
+//获取客户端IP
+function get_real_ip() {
+	$ip=FALSE;
+	//客户端IP 或 NONE
+	if(!empty($_SERVER["HTTP_CLIENT_IP"])) {
+		$ip = $_SERVER["HTTP_CLIENT_IP"];
+	}
+	//多重代理服务器下的客户端真实IP地址（可能伪造）,如果没有使用代理，此字段为空
+	if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
+		$ips = explode (", ", $_SERVER['HTTP_X_FORWARDED_FOR']);
+		if ($ip) {
+			array_unshift($ips, $ip);
+			$ip = FALSE;
+		}
+		for ($i = 0; $i < count($ips); $i++) {
+			if (!eregi ("^(10│172.16│192.168).", $ips[$i])) {
+				$ip = $ips[$i];
+				break;
+			}
+		}
+	}
+	//客户端IP 或 (最后一个)代理服务器 IP
+	return ($ip ? $ip : $_SERVER['REMOTE_ADDR']);
+}
 ?>
\ No newline at end of file