#Snow{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 99999;
    background: rgba(0,0,0,0);
    pointer-events: none;
}

#google_ad_c1, #google_ad_c2 {display:none;}
.syntaxhighlighter a, .syntaxhighlighter div, .syntaxhighlighter code, .syntaxhighlighter table, .syntaxhighlighter table td, 
.syntaxhighlighter table tr, .syntaxhighlighter table tbody, .syntaxhighlighter table thead, .syntaxhighlighter table caption, 
.syntaxhighlighter textarea {
font-size: 14px!important;
}
#home {
    opacity: 0.8;
    margin: 0 auto;
    width: 65%;
    min-width: 950px;
       background-color: #fff;
    padding: 30px;
    margin-top: 30px;
    margin-bottom: 50px;
    box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}
#blogTitle h1 {
    font-size: 30px;
    font-weight: bold;
    font-family: "Comic Sans MS";
    line-height: 1.5em;
    margin-top: 20px;
    color: #515151;
}

#blogTitle h2 {
    font-weight: normal;
    font-size: 13px;
    font-size: .928571429rem;
    line-height: 1.846153846;
    color: #757575;
    float: left;
}

h1, h2, h3 {
    margin-top: 0px;
    margin-bottom: 15px;
}

#navList a:hover {
color: #4C9ED9;
text-decoration: none;
}
#navList a {
display: block;
width: 5em;
height: 22px;
float: left;
text-align: center;
padding-top: 18px;
}
#navigator {
font-size: 15px;
border-bottom: 1px solid #ededed;
border-top: 1px solid #ededed;
height: 50px;
clear: both;
margin-top: 25px;
}
.catListTitle {
margin-top: 21px;
margin-bottom: 10.5px;
text-align: left;
border-left: 10px solid rgba(82, 168, 236, 0.8);
padding: 10px 0 14px 10px;
background-color: #f5f5f5;
}
#ad_under_post_holder #google_ad_c1,#google_ad_c2{  
display: none !important;
}
body {
color: #000;
background: url(https://ymzqwq.files.wordpress.com/2019/07/2ff9090f0cf3d7ca4c99c14cfc1fbe096a63a9fe.jpg
) fixed;
background-size: 105%;
background-repeat: no-repeat;
font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
font-size: 12px;
min-height: 101%;
}

#topics .postTitle {
    border: 0;
    font-size: 130%;
    font-weight: bold;
    float: left;
    line-height: 1.5;
    width: 100%;
    padding-left: 5px;
}

div.commentform p{
margin-bottom:10px;
}
.comment_btn {
padding: 5px 10px;
height: 35px;
width: 90px;
border: 0 none;
border-radius: 5px;
background: #ddd;
color: #999;
cursor:pointer;
font-family: "Lato", Helvetica Neue, Helvetica, Microsoft Yahei, 宋体, Arial, sans-serif;
text-shadow: 0 0 1px #fff;
display: inline !important;
}
.comment_btn:hover{
padding: 5px 10px;
height: 35px;
width: 90px;
border: 0 none;
border-radius: 5px;
background: #258fb8;
color: white;
cursor:pointer;
font-family: "Lato", Helvetica Neue, Helvetica, Microsoft Yahei, 宋体, Arial, sans-serif;
text-shadow: 0 0 1px #fff;
display: inline !important;
}
#commentform_title {
background-image:none;
background-repeat:no-repeat;
margin-bottom:10px;
padding:0;
font-size:24px;
}
#commentbox_opt,#commentbox_opt + p {
text-align:center;
}
.commentbox_title {
width: 100%;
}
#tbCommentBody {
font-family:'Microsoft Yahei', Microsoft Yahei, 宋体, sans-serif;
margin-top:10px;
max-width:100%;
min-width:100%;
background:white;
color:#333;
border:2px solid #fff;
box-shadow:inset 0 0 8px #aaa;
// padding:10px;
height:250px;
font-size:14px;
min-height:120px;
}
.feedbackItem {
font-size:14px;
line-height:24px;
margin:10px 0;
padding:20px;
background:#F2F2F2;
box-shadow:0 0 5px #aaa;
}
.feedbackListSubtitle {
font-weight:normal;
}

#blog-comments-placeholder, #comment_form {
padding: none;
background: #fff;
-webkit-box-shadow: 1px 2px 3px #ddd;
box-shadow: 1px 2px 3px #ddd;
}
.feedback_area_title {
margin-bottom: 15px;
font-size: 1.8em;
}
.feedbackItem {
border-bottom: 1px solid #CCC;
margin-bottom: 10px;
padding: 5px;
background: rgb(248, 248, 248);
}
.color_shine {background: rgb(226, 242, 255);}
.feedbackItem:hover {-webkit-animation-name: color_shine;-webkit-animation-duration: 2s;-webkit-animation-iteration-count: infinite;}
#comment_form .title {
font-weight: normal;
margin-bottom: 15px;
}








    public class CheckIP
    {
        #region 获取浏览器版本号

        /// <summary>  
        /// 获取浏览器版本号  
        /// </summary>  
        /// <returns></returns>  
        public static string GetBrowser()
        {
            HttpBrowserCapabilities bc = HttpContext.Current.Request.Browser;
            return bc.Browser + bc.Version;
        }

        #endregion

        #region 获取操作系统版本号

        /// <summary>  
        /// 获取操作系统版本号  
        /// </summary>  
        /// <returns></returns>  
        public static string GetOSVersion()
        {
            //UserAgent   
            var userAgent = HttpContext.Current.Request.ServerVariables["HTTP_USER_AGENT"];

            var osVersion = "未知";

            if (userAgent.Contains("NT 6.1"))
            {
                osVersion = "Windows 7";
            }
            else if (userAgent.Contains("NT 6.0"))
            {
                osVersion = "Windows Vista/Server 2008";
            }
            else if (userAgent.Contains("NT 5.2"))
            {
                osVersion = "Windows Server 2003";
            }
            else if (userAgent.Contains("NT 5.1"))
            {
                osVersion = "Windows XP";
            }
            else if (userAgent.Contains("NT 5"))
            {
                osVersion = "Windows 2000";
            }
            else if (userAgent.Contains("NT 4"))
            {
                osVersion = "Windows NT4";
            }
            else if (userAgent.Contains("Me"))
            {
                osVersion = "Windows Me";
            }
            else if (userAgent.Contains("98"))
            {
                osVersion = "Windows 98";
            }
            else if (userAgent.Contains("95"))
            {
                osVersion = "Windows 95";
            }
            else if (userAgent.Contains("Mac"))
            {
                osVersion = "Mac";
            }
            else if (userAgent.Contains("Unix"))
            {
                osVersion = "UNIX";
            }
            else if (userAgent.Contains("Linux"))
            {
                osVersion = "Linux";
            }
            else if (userAgent.Contains("SunOS"))
            {
                osVersion = "SunOS";
            }
            return osVersion;
        }
        #endregion

        #region 获取客户端IP地址

        /// <summary>  
        /// 获取客户端IP地址  
        /// </summary>  
        /// <returns></returns>  
        public static string GetIP()
        {
            string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
            if (string.IsNullOrEmpty(result))
            {
                result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
            }
            if (string.IsNullOrEmpty(result))
            {
                result = HttpContext.Current.Request.UserHostAddress;
            }
            if (string.IsNullOrEmpty(result))
            {
                return "0.0.0.0";
            }
            return result;
        }

        #endregion

        #region 取客户端真实IP

        ///  <summary>    
        ///  取得客户端真实IP。如果有代理则取第一个非内网地址    
        ///  </summary>    
        public static string GetIPAddress
        {
            get
            {
                var result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
                if (!string.IsNullOrEmpty(result))
                {
                    //可能有代理    
                    if (result.IndexOf(".") == -1)        //没有“.”肯定是非IPv4格式    
                        result = null;
                    else
                    {
                        if (result.IndexOf(",") != -1)
                        {
                            //有“,”，估计多个代理。取第一个不是内网的IP。    
                            result = result.Replace("  ", "").Replace("'", "");
                            string[] temparyip = result.Split(",;".ToCharArray());
                            for (int i = 0; i < temparyip.Length; i++)
                            {
                                if (IsIPAddress(temparyip[i])
                                        && temparyip[i].Substring(0, 3) != "10."
                                        && temparyip[i].Substring(0, 7) != "192.168"
                                        && temparyip[i].Substring(0, 7) != "172.16.")
                                {
                                    return temparyip[i];        //找到不是内网的地址    
                                }
                            }
                        }
                        else if (IsIPAddress(result))  //代理即是IP格式    
                            return result;
                        else
                            result = null;        //代理中的内容  非IP，取IP    
                    }

                }

                string IpAddress = (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null && HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != String.Empty) ? HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] : HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"];

                if (string.IsNullOrEmpty(result))
                    result = HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"];

                if (string.IsNullOrEmpty(result))
                    result = HttpContext.Current.Request.UserHostAddress;

                return result;
            }
        }

        #endregion

        #region  判断是否是IP格式

        ///  <summary>  
        ///  判断是否是IP地址格式  0.0.0.0  
        ///  </summary>  
        ///  <param  name="str1">待判断的IP地址</param>  
        ///  <returns>true  or  false</returns>  
        public static bool IsIPAddress(string str1)
        {
            if (string.IsNullOrEmpty(str1) || str1.Length < 7 || str1.Length > 15) return false;

            const string regFormat = @"^d{1,3}[.]d{1,3}[.]d{1,3}[.]d{1,3}$";

            var regex = new Regex(regFormat, RegexOptions.IgnoreCase);
            return regex.IsMatch(str1);
        }

        #endregion

        #region 获取公网IP
        /// <summary>  
        /// 获取公网IP  
        /// </summary>  
        /// <returns></returns>  
        public static string GetNetIP()
        {
            string tempIP = "";
            try
            {
                System.Net.WebRequest wr = System.Net.WebRequest.Create("https://city.ip138.com/ip2city.asp");
                System.IO.Stream s = wr.GetResponse().GetResponseStream();
                System.IO.StreamReader sr = new System.IO.StreamReader(s, System.Text.Encoding.GetEncoding("gb2312"));
                string all = sr.ReadToEnd(); //读取网站的数据  

                int start = all.IndexOf("[") + 1;
                int end = all.IndexOf("]", start);
                tempIP = all.Substring(start, end - start);
                sr.Close();
                s.Close();
            }
            catch
            {
                if (System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList.Length > 1)
                    tempIP = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList[1].ToString();
                if (string.IsNullOrEmpty(tempIP))
                    return GetIP();
            }
            return tempIP;
        }
        #endregion
    } 









<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
    <link href="css/demo.css" rel="stylesheet" />
    <script src="js/jquery-1.10.2.min.js"></script>
    <script src="js/demo.js"></script>
</head>
<body>

</body>
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