<form action="/plus/diy.php" enctype="multipart/form-data" method="post">   <input type="hidden" name="action" value="post" />   <input type="hidden" name="diyid" value="1" />   <input type="hidden" name="do" value="2" />   <table style="width:97%;" cellpadding="0" cellspacing="1">   <tr>   <td align="right" valign="top">電話：</td>   <td><input type='text' name='dh' id='dh' style='width:250px'  class='intxt' value='' />   </td>   </tr>   <tr>   <td align="right" valign="top">郵箱：</td>   <td><input type='text' name='xy' id='xy' style='width:250px'  class='intxt' value='' />   </td>   </tr>   <tr>   <td align="right" valign="top">內容：</td>   <td><textarea name='nr' id='nr' style='width:90%;height:80'></textarea>   </td>   </tr>   <input type="hidden" name="dede_fields" value="dh,text;xy,text;nr,multitext" />   <input type="hidden" name="dede_fieldshash" value="ad50c1ee216430a63d64780d3e5e7262" /></table>   <div align='center' style='height:30px;padding-top:10px;'>   <input type="submit" name="submit" value="提 交" class='coolbg' />   &nbsp;   <input type="reset" name="reset" value="重 置" class='coolbg' />   </div>   </form>

<input type="button" value="提 交" onclick="add_ajaxmessage()" />刪除原表單中的這些表格<input type="hidden" name="action" value="post" /><input type="hidden" name="diyid" value="1" /><input type="hidden" name="do" value="2" /><input type="hidden" name="dede_fields" value="dh,text;xy,text;nr,multitext" /><input type="hidden" name="dede_fieldshash" value="ad50c1ee216430a63d64780d3e5e7262" />把ajax代碼放在頁面最底部（不能放在jquery庫之前）<script type="text/javascript">function add_ajaxmessage(){    var dataString =      'dh='+dh.value+ //表單的name和id值必須一致，注意：這一行最前面不能帶有'&'符號      '&yx='+yx.value+ //表單的name和id值必須一致，多個input請自行復制此行代碼      '&nr='+nr.value+ //表單的name和id值必須一致，多個input請自行復制此行代碼      '&action=post'+      '&diyid=1&do=2&dede_fields=dh,text;yx,text;nr,multitext&dede_fieldshash=ad50c1ee216430a63d64780d3e5e7262';    $.ajax({        type: "POST",        url: "/plus/diy.php",//提交到后臺文件        data: dataString,//傳值        success: function(data) {            //$("#666").html(data);//以html的形式顯示在指定id的元素里，看下面注釋01            alert(data);//顯示PHP返回的值，如不需要顯示，注釋掉這行即可            $('#form')[0].reset();//提交后清除id="form"的值        }    });    return false;}</script>

<script type="text/javascript">function add_ajaxmessage(){   var dataString =     'dh='+dh.value+ //表單的name和id值必須一致，注意：這一行最前面不能帶有'&'符號     '&yx='+yx.value+ //表單的name和id值必須一致，多個input請自行復制此行代碼     '&nr='+nr.value+ //表單的name和id值必須一致，多個input請自行復制此行代碼     '&action=post'+     '&diyid=1&do=2&dede_fields=dh,text;yx,text;nr,multitext&dede_fieldshash=ad50c1ee216430a63d64780d3e5e7262';   $.ajax({       type: "POST",       url: "/plus/diy.php",//提交到后臺文件       data: dataString,//傳值       success: function(data) {           //$("#666").html(data);//以html的形式顯示在指定id的元素里           alert(data);//顯示PHP返回的值，如不需要顯示，注釋掉這行即可           $('#form')[0].reset();//提交后清除id="form"的值       }   });   return false;}</script>

<form action="/plus/diy.php" enctype="multipart/form-data" method="post">   <input type="hidden" name="action" value="post" />   <input type="hidden" name="diyid" value="1" />   <input type="hidden" name="do" value="2" />   <table style="width:97%;" cellpadding="0" cellspacing="1">   <tr>   <td align="right" valign="top">電話：</td>   <td><input type='text' name='dh' id='dh' style='width:250px'  class='intxt' value='' />   </td>   </tr>   <tr>   <td align="right" valign="top">郵箱：</td>   <td><input type='text' name='xy' id='xy' style='width:250px'  class='intxt' value='' />   </td>   </tr>   <tr>   <td align="right" valign="top">內容：</td>   <td><textarea name='nr' id='nr' style='width:90%;height:80'></textarea>   </td>   </tr>   <input type="hidden" name="dede_fields" value="dh,text;xy,text;nr,multitext" />   <input type="hidden" name="dede_fieldshash" value="ad50c1ee216430a63d64780d3e5e7262" /></table>   <div align='center' style='height:30px;padding-top:10px;'>   <input type="submit" name="submit" value="提 交" class='coolbg' />   &nbsp;   <input type="reset" name="reset" value="重 置" class='coolbg' />   </div></form>