HTML

<form name="CLD">
    <table width="100%" border="0" cellpadding="0" cellspacing="0" class="datetable">
        <thead>
            <tr>
                <td colspan="7">
                    <span>公历</span>
                    <select name="SY" onchange="changeCld();" style="font-size: 9pt">
                        <script>
                            for (i = 1900; i < 2050; i++)
                                document.write('<option>' + i);
                        </script>
                    </select><span>年</span>
                    <select name="SM" onchange="changeCld();" style="font-size: 9pt">
                        <script>
                            for (i = 1; i < 13; i++)
                                document.write('<option>' + i);
                        </script>
                    </select><span>月</span> </font><span id="GZ"></span>
                </td>
            </tr>
        </thead>
        <tbody>
            <tr style="background: #eee;">
                <td width="54">
                    日
                </td>
                <td width="54">
                    一
                </td>
                <td width="54">
                    二
                </td>
                <td width="54">
                    三
                </td>
                <td width="54">
                    四
                </td>
                <td width="54">
                    五
                </td>
                <td width="54">
                    六
                </td>
            </tr>
        <script>
            var gNum;
            for (i = 0; i < 6; i++) {
                document.write('<tr align="center">');
                for (j = 0; j < 7; j++) {
                    gNum = i * 7 + j;
                    document.write('<td id="GD' + gNum + '"><font id="SD' + gNum + '" size=2 face="Arial Black"');
                    if (j == 0)
                        document.write('color="red"');
                    if (j == 6)
                        document.write('color="#000080"');
                    document.write('></font><br/><font id="LD' + gNum + '" size=2 style="font-size:9pt"></font></td>');
                }
                document.write('</tr>');
            }
        </script>
        </tbody>
    </table>
</form>

最后记得初始化：

initial();