<!DOCTYPE html> <HTML> <HEAD> <TITLE>学习网"web开发"网址是:www.webkfa.com</TITLE> </HEAD> <BODY> <h1>html5做输入提示太简单了</h1> 只能在支持html5的浏览器才能生效 <input type="text" placeholder='请输入:www.webkfa.com' style="width:200px;" autofocus x-webkit-speech /> </BODY> </HTML>