清除rax的常用方法是<body>
<div class="app">
<!-- Content wil go here :)-->
<!-- Tab links -->
<div class="tab">
<button class="tablinks" onclick="openTab(event, 'temperature')">Temperature</button>
<button class="tablinks" onclick="openTab(event, 'distance')">Distance</button>
<button class="tablinks" onclick="openTab(event, 'about')">About</button>
</div>
<!-- Tab content -->
<div id="temperature" class="tabcontent">
<h3>London</h3>
<p>London is the capital city of England.</p>
</div>
<div id="distance" class="tabcontent">
<h3>Paris</h3>
<p>Paris is the capital of France.</p>
</div>
<div id="about" class="tabcontent">
<h3>Tokyo</h3>
<p>Tokyo is the capital of Japan.</p>
</div>
</div>
<script type="text/javascript" src="cordova.js"></script>
<script type="text/javascript" src="js/index.js"></script>
</body>
</html>
/* Style the tab */
.tab {
overflow: hidden;
border: 1px solid #ccc;
background-color: #f1f1f1;
}
/* Style the buttons that are used to open the tab content */
.tab button {
background-color: inherit;
float: left;
border: none;
outline: none;
cursor: pointer;
padding: 14px 16px;
transition: 0.3s;
}
/* Change background color of buttons on hover */
.tab button:hover {
background-color: #ddd;
}
/* Create an active/current tablink class */
.tab button.active {
background-color: #ccc;
}
/* Style the tab content */
.tabcontent {
display: none;
padding: 6px 12px;
border: 1px solid #ccc;
border-top: none;
}
var app = {
// Application Constructor
initialize: function() {
document.addEventListener('deviceready', this.onDeviceReady.bind(this), false);
},
onDeviceReady: function() {
document.getElementById("temperature").addEventListener("click", this.temperature);
},
openCity: function(evt, cityName)
{
var i, tabcontent, tablinks;
tabcontent = document.getElementsByClassName("tabcontent");
for (i = 0; i < tabcontent.length; i++) {
tabcontent[i].style.display = "none";
}
tablinks = document.getElementsByClassName("tablinks");
for (i = 0; i < tablinks.length; i++) {
tablinks[i].className = tablinks[i].className.replace(" active", "");
}
document.getElementById(cityName).style.display = "block";
evt.currentTarget.className += " active";
}
};
app.initialize();
（0x4831C0），但该操作会影响标志位。
如何在不影响标志的情况下清除rax？
例如：
xor rax,rax有更多或更好的方法吗？