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POForm validation in an HTA file
 

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    <p>How can I perform a simple validation on this HTA form to make sure that data is inputted and an option is selected? This should be simple, I'm not sure what I'm missing.</p> <p>Any answers or suggestions would be appreciated.</p> <p>Thanks.</p> <pre><code>&lt;html&gt;&lt;head&gt;&lt;title&gt;Write data to text file&lt;/title&gt; &lt;HTA:APPLICATION border="thin" borderStyle="normal" caption="yes" maximizeButton="no" minimizeButton="yes" showInTaskbar="yes" innerBorder="yes" navigable="yes" scroll="auto" scrollFlat="yes" /&gt; &lt;script language="javascript"&gt; window.resizeTo(480,150) function Writedata() { var fso = new ActiveXObject("Scripting.FileSystemObject"); var write_id; write_id = document.getElementById('write_id').value ; alert('The data has been written to \n' + write_id); var s = fso.OpenTextFile(write_id, 8, true); s.WriteLine(document.getElementById('name_id').value); s.Close(); } &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;table&gt; &lt;tr&gt; &lt;h3&gt;Input some information&lt;/h3&gt; &lt;form&gt; &lt;td&gt;Input: &lt;/td&gt;&lt;td&gt;&lt;input type="text" name="name" value="" id="name_id"&gt;&lt;/td&gt; &lt;td&gt;&lt;select id="write_id"&gt; &lt;option name="write" value=""&gt;Select an Option&lt;/option&gt; &lt;option name="write" value="C:\temp\option1.txt"&gt;Option1&lt;/option&gt; &lt;option name="write" value="C:\temp\option2.txt"&gt;Option2&lt;/option&gt; &lt;/select&gt;&lt;/td&gt; &lt;td&gt;&lt;input type="button" onclick="Writedata()" value="submit"&gt;&lt;/td&gt; &lt;/form&gt; &lt;/tr&gt; &lt;/table&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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    1. COYou can find [`select.selectedIndex`](https://developer.mozilla.org/en-US/docs/DOM/HTMLSelectElement) and [`input.value`](https://developer.mozilla.org/en-US/docs/DOM/HTMLInputElement) at MDN.
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