<input type="text" name="" class="text_1" maxlength="20" id="form_2" placeholder="请输入手机号码" autocomplete="off" onkeyup="value=value.replace(/[^\d.]/g,'')"/>
<input type="text" name="" class="text_1" maxlength="20" id="form_2" placeholder="请输入手机号码" autocomplete="off" onkeyup="value=value.replace(/[^\d.]/g,'')"/>