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<!DOCTYPE html>
<html>
<body>
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<h2>JavaScript setDate()</h2>
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<p>setDate() 方法可用于向日期添加天数。</p>
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<p id="demo"></p>
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<script>
var d = new Date();
d.setDate(d.getDate() + 50);
document.getElementById("demo").innerHTML = d;
</script>
​
</body>
</html>
​