JS localStorage实现本地缓存的方法

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>本地缓存</title>
    <script type="text/javascript">
        var strKey = "strKey";
        var storage = window.localStorage;

        function onStart(){
            if(storage.getItem(strKey)!=null){
                alert(storage.getItem(strKey)+'localStorage');
            }else if(Cookie.read(strKey)!=null){
                alert(Cookie.read(strKey)+'cookie');
            }
        }
        function bendihuancun(){
            var strValue = document.getElementById("username").value;
            if (storage) {
            storage.setItem(strKey, strValue);  
        } else {
            Cookie.write(strKey, strValue); 
        }
        }
    </script>
  </head>
  <body>
    <input type="text" value="123">
    <input type="button" value="保存缓存">
  </body>
</html>

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