placeholder 兼容处理

<div class="f_border_two article-author clearfix">
                    <div class="m_input fl">
                        <input type="text" id="author" value="" name="" maxlength="50">
                        <label for="">姓名</label>
                        <p class="cue">请填写姓名</p>
                    </div>
                    <div class="m_input fl">
                        <input type="text" id="phone" value="" name="" maxlength="50">
                        <label for="phone">联系方式</label>
                        <p class="cue">请填写联系方式</p>
                    </div>
                    <div class="m_input fr">
                        <input type="text" id="school" value="" name="" maxlength="100">
                        <label for="school">所属学校</label>
                        <p class="cue">请填写所属学校</p>
                    </div>
                </div>      

//去掉input label 提示
                $(".f_border_two input,.f_border_two textarea").on({
                    'focus': function () {
                        var self = $(this);
                        if (self.val() == '') {
                            self.siblings('label').hide();
                        }
                    },
                    'blur': function () {
                        var self = $(this);
                        if (self.val() == '') {
                            self.siblings('label').show();
                        }
                    }
                });