$.extend($.fn.textbox.defaults.rules, {
    number : {
        validator : function(value, param) {
            return /^[0-9]*$/.test(value);
        },
        message : "請輸入數字"
    },
    chinese : {
        validator : function(value, param) {
            var reg = /^[\u4e00-\u9fa5]+$/i;
            return reg.test(value);
        },
        message : "請輸入中文"
    },
    checkLength: {
        validator: function(value, param){
            return param[0] >= get_length(value);
        },
        message: '請輸入最大{0}位字元'
    },
    specialCharacter: {
        validator: function(value, param){
            var reg = new RegExp("[`
 
[email protected]#$^&*()=|{}':;'\\[\\]<>~！@#￥……&*（）——|{}【】‘；：”“'、？]");
            return !reg.test(value);
        },
        message: '不允許輸入特殊字元'
    }    

    englishLowerCase  : {// 驗證英語小寫
        validator : function(value) {
            return /^[a-z]+$/.test(value);
        },
        message : '請輸入小寫字母'
    }
});
 

<div id="dlg" class="easyui-dialog" style=" width:400px; height:300px; padding:10px 20px;" data-options="resizable:true,modal:true"  closed="true" buttons="#dlg-buttons">
        <form id="fm" method="post" >
            <table>
                <tr>
                    <td class="normal" width="200px">登入名</td>
                    <td><input id="loginname_dlg"  name="loginname_dlg" class="easyui-textbox" required="true"  style="height:25px;" data-options="validType:['englishLowerCase','checkLength[50]']" >
                        <input  id="id_dlg"  name="id_dlg"  type="hidden">
                    </td>
                </tr>
                <tr>
                    <td class="normal" width="200px">使用者名稱</td>
                    <td><input id="username_dlg"  name="username_dlg" class="easyui-textbox" required="true"  style="height:25px;" data-options="validType:['chinese','checkLength[50]']"></td>
                </tr>
                <tr>
                    <td class="normal" width="200px">聯絡電話</td>
                    <td><input id="phone_dlg"  name="phone_dlg" class="easyui-textbox"  style="height:25px;" data-options="validType:['number','length[11,11]']" ></td>
                </tr>
                
            </table>
        </form>
    </div>
    <div id="dlg-buttons">
        <a id="dlg-save"  href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-ok" onclick="save()">儲存</a>
        <a id="dlg-close" href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-cancel" onclick="javascript:$('#dlg').dialog('close')">關閉</a>
    </div>