2、 Web Storage 2.1 session Storage 数据存储的实现 案例21-01: sessionStorage示例演示程序 <script type tert/ javascript> 存储筒单数据 function saveSimpleString0 I var xsl=document. getElementById(zs") sessionStorage, setItem(" course’,"eb前端技术开发与实践 xs1 value=se torage getItem( course) document. write (xsl value) 存储结构化教据 function saveStructuredData0 I var studentInfo =[ arsenUm " coursenum":"1","nme":“姓名”], " courseNum":"2,"nme":“性别”], essionStorage. setItem("studentInfo, JSON. stringify(studentInfo))2、Web Storage 2.1 sessionStorage  数据存储的实现  案例21-01：sessionStorage示例演示程序  <script type="text/javascript">  //存储简单数据  function saveSimpleString() {  var xs1=document.getElementById("xs");   sessionStorage.setItem("course", "Web前端技术开发与实践");  xs1.value=sessionStorage.getItem("course");  document.write(xs1.value);  }  //存储结构化数据  function saveStructuredData() {  var studentInfo = [  { "courseNum": "0", "name": "学号" },  { "courseNum": "1", "name": "姓名" },  { "courseNum": "2", "name": "性别" },  ]  sessionStorage.setItem("studentInfo", JSON.stringify(studentInfo));  }  </script>