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POConditional form not working
 

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    <p>I am new to javascript and I am trying to add a conditional field to a form. I have looked at these posts:<br><br> <a href="https://stackoverflow.com/questions/1992114/how-do-you-create-a-hidden-div-that-doesnt-create-a-line-break-or-horizontal-sp">How do you create a hidden div that doesn&#39;t create a line break or horizontal space?</a>? <br> <a href="https://stackoverflow.com/questions/3961422/conditional-display-of-html-element-forms">conditional display of html element forms</a></p> <p>I have come up with this little example so far which works fine. <br> </p> <pre><code>&lt;html&gt; &lt;head&gt; &lt;script language="javascript"&gt; function cucu(form){ if(form.check.checked){ document.getElementById("cucu").style.visibility="visible"; } else{ document.getElementById("cucu").style.visibility="hidden"; } } function load() { document.getElementById("cucu").style.visibility="hidden"; } &lt;/script&gt; &lt;/head&gt; &lt;body onload="load()"&gt; &lt;form id="form"&gt; &lt;input type="checkbox" name="check" onclick="cucu(this.form)" &gt; &lt;div id="cucu"&gt; CUCU &lt;/div&gt; &lt;/form&gt; &lt;/body&gt; &lt;html&gt; </code></pre> <p>I have tried the same method on a larger side and the only change is that the hidden element is a text field but it just doesnt' work.</p> <p>This is the part of the form:</p> <pre><code>Album: &lt;INPUT TYPE="checkbox" NAME="checkAlbum" onclick="checkAlbum(this.form)" id="idAlbum"&gt; &lt;div id="divAlbum" &gt; Choisir un album : &lt;input type="text" name="Album" list="Albums"&gt; &lt;datalist id="Albums"&gt; &lt;?php $requete = 'SELECT DISTINCT titreAlbum FROM Album'; $resultat = mysqli_query($connexion, $requete); while($row = mysqli_fetch_assoc($resultat)){ echo '&lt;option value="'.$row['titreAlbum'].'"&gt;'; } ?&gt; &lt;/datalist&gt; &lt;br&gt;&lt;br&gt; &lt;/div&gt; </code></pre> <p>My head looks as follows:</p> <pre><code>&lt;!DOCTYPE html&gt; &lt;head&gt; &lt;meta http-equiv="Content-Type" content="text/html ; charset=UTF-8" /&gt; &lt;title&gt;BLABLA&lt;/title&gt; &lt;link rel="stylesheet" type="text/css" href="include/styles.css"&gt; &lt;script language="javascript" &gt; function hideElements(){ document.getElementById("divAlbum").style.visibility="hidden"; } function checkAlbum(form){ if(form.checkAlbum.checked){ document.getElementById("divAlbum").style.visibility="visible"; }else{ document.getElementById("divAlbum").style.visibility="hidden"; } } &lt;/script&gt; &lt;/head&gt; </code></pre> <p>I really don't know what the problem is. I've checked the functions again and again. Any suggestions for the possible error? Thanks</p>
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    1. COWhat exactly is the problem? "not working" isn't really a problem description and referencing other questions still leaves us wondering if you're solving the same problem or a different one. If it's the same problem, why are you not using the same solution, `display: none` instead of setting `visibility`?
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    2. COWhat HTML does that php generate? JavaScript works client-side, so the server-side script is irrelevant to your question; we need the HTML.
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    3. COWhen I check the Album checkbox nothing happens the <div id="divAlbum"> field stays hidden.
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