asp.net用js显示本地时间

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="用来测试.aspx.cs" Inherits="用来测试" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
    
        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
    
    </div>
        <span id="localtime"></span>
      <script type="text/javascript">
        function showLocale(objD) {
            var str, colorhead, colorfoot;
            var yy = objD.getYear();
            if (yy < 1900) yy = yy + 1900;
            var MM = objD.getMonth() + 1;
            if (MM < 10) MM = '0' + MM;
            var dd = objD.getDate();
            if (dd < 10) dd = '0' + dd;
            var hh = objD.getHours();
            if (hh < 10) hh = '0' + hh;
            var mm = objD.getMinutes();
            if (mm < 10) mm = '0' + mm;
            var ss = objD.getSeconds();
            if (ss < 10) ss = '0' + ss;
            var ww = objD.getDay();
            if (ww == 0) colorhead = "<font color=\"#FF0000\">";
            if (ww > 0 && ww < 6) colorhead = "<font color=\"#aeaeae\">";
            if (ww == 6) colorhead = "<font color=\"#008000\">";
            if (ww == 0) ww = "星期日";
            if (ww == 1) ww = "星期一";
            if (ww == 2) ww = "星期二";
            if (ww == 3) ww = "星期三";
            if (ww == 4) ww = "星期四";
            if (ww == 5) ww = "星期五";
            if (ww == 6) ww = "星期六";
            colorfoot = "</font>"
            str = colorhead + yy + "-" + MM + "-" + dd + " " + hh + ":" + mm + ":" + ss + "  " + ww + colorfoot;
            return (str);
        }
        function tick() {
            var today;
            today = new Date();
            document.getElementById("localtime").innerHTML = showLocale(today);
            window.setTimeout("tick()", 1000);
        }
        tick();
</script>
    </form>
</body>
</html>

document.getElementById('xx').innerHTML = "html代码"
假设xx是div的id
表示将 html代码替换到id为xx的div标签中去 <div id="xx">此处</div>
这样就在不刷新页面的情况下更改页面的部分内容.

asp.net用js显示本地时间

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