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<!DOCTYPE html>
<html>
<body>
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<h1>Storage setItem() 方法</h1>
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<p>本例演示如何使用 setItem() 方法设置指定的本地存储项的值。</p>
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<button onclick="createItem()">设置本地存储项</button>
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<h2>获取值</h2>
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<p>单击按钮来获取项目值：</p>
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<button onclick="readValue()">获取项目值</button>
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<p id="demo"></p>
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<script>
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function createItem() {
  localStorage.setItem("mytime", Date.now());
}
​
function readValue() {
  var x = localStorage.getItem("mytime");
  document.getElementById("demo").innerHTML = x;
}
​
</script>
</body>
</html>
​