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    <p>There are a lot of ways you could do this. The most straightforward would be to just put a checkbox next to each paragraph. The user can check the boxes next to the paragraphs of his choosing.</p> <p>If you have a smoother interface in mind, you can extend that idea by hiding the checkboxes with CSS, then using JavaScript to <del>make the checkboxes selected when the corresponding paragraph is clicked and</del> highlight the paragraph (by applying a CSS class) to show it as selected. A framework like jQuery will streamline this process nicely.</p> <p><strong>Edit:</strong> Now that I think of it, as long as you put each paragraph in a <code>&lt;label&gt;</code> element you don't even need JavaScript to check/uncheck the hidden checkboxes; that will happen automatically as long as the label's <code>for</code> attribute is set correctly. All you need JavaScript for is to highlight/unhighlight the labels.</p> <p>Here's a naive implementation using jQuery:</p> <pre><code>&lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;style type="text/css"&gt; input.hidden-checkbox { display: none; } label.multi-select { display: block; cursor: pointer; } label.checked { background-color: #ddd; } &lt;/style&gt; &lt;script type="text/javascript" src="jquery.js"&gt;&lt;/script&gt; &lt;script type="text/javascript"&gt; $(document).ready(function() { $('input.hidden-checkbox').bind('change', function(e) { var checkBox = $(e.target), label = $('label[for=' + checkBox.attr('id') + ']'); if(label) { if(checkBox.attr('checked')) { label.addClass('checked'); } else { label.removeClass('checked'); } } }); }); &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;form&gt; &lt;input type="checkbox" value="1" name="paragraph[]" id="paragraph-1" class="hidden-checkbox"/&gt; &lt;label for="paragraph-1" class="multi-select"&gt;Text of paragraph 1. As long as you want. Lorem ipsum dolor sit amet...&lt;/label&gt; &lt;input type="checkbox" value="2" name="paragraph[]" id="paragraph-2" class="hidden-checkbox" class="multi-select" /&gt; &lt;label for="paragraph-2" class="multi-select"&gt;Paragraph 2's text. Lorem ipsum dolor sit amet...&lt;/label&gt; &lt;!-- ...etc... --&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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    1. CO+1 for progressive enhancement. Would be pretty easy to implement even without a JS framework.
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