js实现点击按钮可实现编辑

<script type="text/javascript">
//修改密码
//抓取到的数据
 function edit() {
 document.getElementById("ps").style.display = "none";
 document.getElementById("pw").style.display = "";
 document.getElementById("of").style.display = "";
 var butt = document.getElementById("btt");
 butt.value = "修 改";
 butt.onclick = function () {
 save();//第二次单击的时候执行这个函数
 };
 }
//取消健
 function off() {
 	var pass = document.getElementById('ps');
 var pws = document.getElementById("pw");
 var butt = document.getElementById("btt");
 document.getElementById("of").style.display = "none",
 butt.value = "编 辑";
 pws.style.display = "none";
 pass.innerHTML = pws.value;
 pass.style.display = "";
 butt.onclick = function () {
 edit();//还原第一次单击的时候执行的函数
 };
 }
//编辑之后的状态
 function save() {
 var pass = document.getElementById('ps');
 var pws = document.getElementById("pw");
 var butt = document.getElementById("btt");
 butt.setAttribute("type","submit");
 butt.value = "编 辑";
 pws.style.display = "none";
 pass.innerHTML = pws.value;
 pass.style.display = "";
 butt.onclick = function () {
 edit();//还原第一次单击的时候执行的函数
 };
 }
</script>
</p>
<form action="oneself.php" method="post">
<p style="font: 16px '宋体';">姓名: <input type="text" name="name" value="张三" /></p>
<p style="font: 16px '宋体';">账号: <input type="text" name="handset" value="13888888888" /></p>
<p style="font: 16px '宋体';">密码: <span id="pass" style="border: 1px solid gray; width: 200px;">888888</span> <textarea id="ei" style="display: none;" name="newpass">888888</textarea> <input id="btt" onclick="edit();" type="button" name="btt" value="编 辑" /> <input id="of" style="display: none;" onclick="off();" type="button" name="of" value="取 消" /></p>
</form>