Scrollable box containing list of Checkboxes in HTML

CSS:

.container { border:2px solid #ccc; width:300px; height: 100px; overflow-y: scroll; }

HTML:

<div class="container">
    <input type="checkbox" /> This is checkbox <br />
    <input type="checkbox" /> This is checkbox <br />
    <input type="checkbox" /> This is checkbox <br />
    <input type="checkbox" /> This is checkbox <br />
    <input type="checkbox" /> This is checkbox <br />
    <input type="checkbox" /> This is checkbox <br />
    <input type="checkbox" /> This is checkbox <br />
    <input type="checkbox" /> This is checkbox <br />
    <input type="checkbox" /> This is checkbox <br />
    <input type="checkbox" /> This is checkbox <br />
</div>

How it looks:

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