表单提交内容都填了还是提示必选项不能为空

            <div class="layui-form-item">
                <label class="layui-form-label">商品名称</label>
                <div class="layui-input-block">  
                      <input type="text" name="productname" id="productname" lay-verify="required"   style="width: 300px;"  autocomplete="off"  class="layui-input" placeholder="商品名称" >
                </div>
            </div>
            
             <div class="layui-form-item">
                <label class="layui-form-label">图片</label>
                <div class="layui-input-block">  
                      <input name='filename' type='text' class="layui-input" lay-verify="required"  style="width: 300px;" id='url'  size='50' value='' />&nbsp;<input type='button' value='上传'  class="layui-input" onClick="up('url')" style="width: 60px;height: 37px;"/>
                </div>
            </div>
            
            <div class="layui-form-item">
                <label class="layui-form-label">商品一级类别</label>
                <div class="layui-input-block" style="width: 300px;">  
                      <select name="fid" id="fid" style="width: 300px;" onChange="Change_Select()" lay-verify="required" lay-filter="fid"  autocomplete="off"  class="layui-input">
                      <option value="">请选择类别</option>
                      <c:forEach items="${list}" var="fcategory">
                        <option value="${fcategory.id}">${fcategory.name}</option>
                      </c:forEach>
                      </select>
                </div>
            </div>
            
            <div class="layui-form-item">
                <label class="layui-form-label">商品二级类别</label>
                <div class="layui-input-block" style="width: 300px;">  
                      <select name="cid" id="cid" style="width: 300px;"   lay-verify="required" lay-filter="cid"  autocomplete="off"  class="layui-input">
                        <option value="">请选择上一级类别</option>
                      </select>
                </div>
            </div>
            
            <div class="layui-form-item">
                <label class="layui-form-label">商品三级类别</label>
                <div class="layui-input-block" style="width: 300px;">  
                      <select name="mid" id="mid" style="width: 300px;" lay-verify="required" lay-filter="mid"   autocomplete="off"  class="layui-input" >
                        <option value="">请选择上一级类别</option>
                      </select>
                </div>
            </div>
            
            <div class="layui-form-item">
                <label class="layui-form-label">商品单价</label>
                <div class="layui-input-block">  
                      <input type="text" name="price" id="price" required oninvalid="setCustomValidity('商品单价不能为空或价格输入有误')" oninput="setCustomValidity('');"  pattern="(0|[1-9][0-9]{0,9})(\.[0-9]{1,2})?" style="width: 300px;"  autocomplete="off"  class="layui-input" placeholder="商品单价" >
                </div>
            </div>
            
            <div class="layui-form-item">
                <label class="layui-form-label">材质</label>
                <div class="layui-input-block">  
                      <input type="text" name="author" id="author" lay-verify="required" oninvalid="setCustomValidity('材质不能为空')" oninput="setCustomValidity('');"  style="width: 300px;"  autocomplete="off"  class="layui-input" placeholder="材质" >
                </div>
            </div>
            
            <div class="layui-form-item">
                <label class="layui-form-label">发货地</label>
                <div class="layui-input-block">  
                      <input type="text" name="press" id="press" lay-verify="required" oninvalid="setCustomValidity('发货地不能为空')" oninput="setCustomValidity('');"  style="width: 300px;"  autocomplete="off"  class="layui-input" placeholder="发货地" >
                </div>
            </div>
            
            <div class="layui-form-item">
                <label class="layui-form-label">商品介绍</label>
                <div class="layui-input-block">  
                      <textarea id="editor_id" name="content" style="width: 600;height: 280px;" placeholder="请输入商品介绍" lay-verify="required" class="layui-textarea" oninvalid="setCustomValidity('商品介绍不能为空')" oninput="setCustomValidity('');" ></textarea>
                </div>
            </div>
            
            
            
            <div class="layui-form-item change-submit">
                <div class="layui-input-block">
                    
                    <button class="layui-btn" lay-submit="" id="supplierbutton" lay-filter="demo1" >立即提交</button>
                    <button type="reset" class="layui-btn layui-btn-primary">重置</button>
                </div>
            </div>
        </form>
    </div>
</div>