用户名:<input type="text" className="one" value="请输入用户名" style="color:#424242" onblur="if(this.value==''){this.value='请输入用户名';this.style.color='#424242'}" onfocus="if(this.value=='请输入用户名'){this.value=''}" onchange="console.log(this.value)"
>
密码:<input type="password" className="one" value="" onchange="console.log(this.value)">