使用JS獲取SessionStorage的值

<script type="text/javascript">
 function login(){
 var username=window.document.getElementById("username").value;
 var password=window.document.getElementById("password").value;
 if(password=="123456")
 {
 window.sessionStorage.setItem("username", username);
 window.location.href="../index1.html" rel="external nofollow" ;
 }else{
 alert("密碼錯(cuò)誤請(qǐng)輸入正確的密碼，例如：123456！");
 return false;
 }
 }
</script>
<input type="text" id="username" class="11" placeholder="請(qǐng)輸入真實(shí)姓名"/>
<input type="password" id="password" placeholder="請(qǐng)輸入密碼（默認(rèn)密碼123456）"/>
<input type="button" value="登錄考試" onclick="login()">

<script>
 $(function () {
 var username= window.sessionStorage.getItem("username")
 $("#yhm").html("登錄用戶："+username)
 $("#name").html(username)
 if(window.sessionStorage.getItem("username")===null){
 alert("您還沒有登錄，請(qǐng)登錄后重試！")
 window.location.href="Pages/index.html" rel="external nofollow" rel="external nofollow" rel="external nofollow" ;
 }
 $("#esc").on("click",function(){
 window.sessionStorage.clear();
 window.location.href="Pages/index.html" rel="external nofollow" rel="external nofollow" rel="external nofollow" ;
 });
 })
 </script>

<div id="yhm"></div> 

<script>
$("#esc").on("click",function(){
 window.sessionStorage.clear();
 window.location.href="Pages/index.html" rel="external nofollow" rel="external nofollow" rel="external nofollow" ;
 });
</script>

<button id="esc" style="background-color: #FF0000">退出考試系統(tǒng)</button>