<input type="password" placeholder="6-20位,数字,字母,下划线" class="form_pas pas1" onafterpaste="if(this.value.length>20){this.value=this.value.substr(0,20)}" onpropertychange="this.value=this.value.substr(0,20);" oninput="this.value=this.value.substr(0,20)">
实时监测输入框值得变化
最新推荐文章于 2020-06-12 09:53:27 发布