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    <p>You retrieve <code>.value</code> from the same object you retrieved <code>.checked</code> from:</p> <pre><code>valore_corrente = vettore[i].value; </code></pre> <p>The object is an <a href="http://www.w3.org/TR/html5/forms.html#htmlinputelement" rel="nofollow"><code>HTMLInputElement</code></a> instance. The value of the checkbox is reflected in the <code>value</code> property, just like whether it's checked is reflected in the <code>checked</code> property.</p> <p>Here's a complete, working example: <a href="http://jsbin.com/uVEvOrU/1" rel="nofollow">Live Copy</a> | <a href="http://jsbin.com/uVEvOrU/1/edit" rel="nofollow">Source</a></p> <pre><code>&lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;meta charset=utf-8 /&gt; &lt;title&gt;Example&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;form id="theform"&gt; &lt;label&gt;&lt;input type="checkbox" value="1" checked&gt;Uno&lt;/label&gt; &lt;br&gt;&lt;label&gt;&lt;input type="checkbox" value="2" checked&gt;Due&lt;/label&gt; &lt;br&gt;&lt;label&gt;&lt;input type="checkbox" value="3"&gt;Tre&lt;/label&gt; &lt;br&gt;&lt;input type="button" id="thebutton" value="Click"&gt; &lt;/form&gt; &lt;script&gt; document.getElementById("thebutton").onclick = function() { var id_form = "theform"; var vettore = document.getElementById(id_form).elements; var contatore = 0; var valore_corrente; var stringaFileSelezionati = ""; for (var i = 0; i &lt; vettore.length; i++) { if (vettore[i].checked) { contatore++; valore_corrente = vettore[i].value; stringaFileSelezionati+= valore_corrente; stringaFileSelezionati+= '?'; } } if (contatore == 0) { alert('Error!!! No file selected!'); return false; } else { alert(stringaFileSelezionati); } }; &lt;/script&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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    1. POplain javascript - get the value of a checked checkbox
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    1. UST.J. Crowder
    1. UST.J. Crowder
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    1. CO+1 for the explanation.
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    2. COWith valore_corrente = vettore[i].value; I get error: undefinedon? (this was my first try)
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    3. CO@newtphp: It [works for me](http://jsbin.com/icAQoVa/1/edit) if I declare variables. Note that in your code, you're not declaring several variables, and in one case (`stringaFileSelezionati`) you're trying to *use* the value of it without having either declared it or given it a value. If you just assign to something you haven't declared, [you fall prey to *The Horror of Implicit Globals*](http://blog.niftysnippets.org/2008/03/horror-of-implicit-globals.html) and it seems to work. But if you try to *read* a value from something you haven't declared, that's a runtime error.
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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