<form action="#">
<p>用户名：<input type="text" id="username"></p>
<p>密&nbsp&nbsp&nbsp码：<input type="password" id="password"></p>
<input type="submit" value="登录" onClick="submit1()">
</form>
<script>
var user=document.getElementById("username")
var pw=document.getElementById("password")
function submit1(){
//将输入框中当前值设置为 cookie
setCookie('user1',user.value,7)
setCookie('password1',pw.value,7)
}
//输入框显示获取的 Cookie 值
user.value=decodeURIComponent(getCookie('user1'))
pw.value=decodeURIComponent(getCookie('password1'))
</script>