html运行实例（jsck_win_scrollby

代码示例：（标识：jsck_win_scrollby_2）
<!DOCTYPE html>
<html>
<body>

<h1>Window 对象</h1>

<h2>scrollBy() 方法</h2>

<p>请单击按钮，来滚动文档。</p>

<button onclick="scrollWin()" style="position:fixed">垂直滚动 100px！</button>
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<p>SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL</p>
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<p>SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL</p>
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<p>SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL</p>
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<p>SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL</p>
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<p>SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL</p>
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<p>SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL</p>
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<p>SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL</p>
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<p>SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL</p>
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<p>SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL SCROLL</p>
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<script>
function scrollWin() {
  window.scrollBy(0, 100);
}
</script>

</body>
</html>