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    <h1>Method 1: Per row closure</h1> <p><a href="http://jsfiddle.net/r6dx6/" rel="nofollow noreferrer">Here is a fiddle</a></p> <p>What you could do is use the <a href="http://api.jquery.com/each/" rel="nofollow noreferrer">each function</a> to create a closure for each row, in this case each row has its own changed variable. </p> <p>Also, rather than bind directly to the input element you can use the <a href="http://api.jquery.com/on/" rel="nofollow noreferrer">on() jQuery function</a> to bind the event listener indirectly.</p> <p><strong>Note:</strong> The inputs are not children directly off the row element so swap <a href="http://api.jquery.com/children/" rel="nofollow noreferrer">children()</a> for <a href="http://api.jquery.com/find/" rel="nofollow noreferrer">find()</a> as well.</p> <pre><code>$( document ).ready(function() { // Using the each function to create // a row specific closure $('.vraagrij').each(function() { // Track the state per row var changed = false // Create a variable to reference the // row directly in the change listener , $row = $(this); // Use event delegation to bind to all // descendant selects of the row efficiently $row.on("change", "select", function(e) { // Make sure the following only runs once // per row if(!changed) { changed = true; // Do something to the input, changing // color for testing purposes var $kids = $row.find("input"); $kids.css('color', 'yellow'); } }); }); }); </code></pre> <h1>Method 2: DOM query / traversal</h1> <p><a href="http://jsfiddle.net/r6dx6/4/" rel="nofollow noreferrer">Another fiddle</a></p> <p>This method uses the state of the DOM to track the changed state:</p> <pre><code>$(document).ready(function() { // Again using event delegation to bind events // efficiently $(".vraagrij").on("change", "select", function(e) { // Collect the parent row var $row = $(this).closest("tr"); // Check if it has already got the // changed class if(!$row.hasClass("changed")) { // Add the changed class in to track // the state and prevent this being // run again for the same row $row .addClass("changed") // Perform the action for the changed // select .find("input") .css("color", "yellow"); } }); }); </code></pre> <h1>Method 3: Use the one method</h1> <p><a href="http://jsfiddle.net/r6dx6/3/" rel="nofollow noreferrer">Another fiddle</a></p> <p>The <a href="http://api.jquery.com/one/" rel="nofollow noreferrer">one method</a> handles the event once.</p> <p><strong>Update</strong> including the great advice from <a href="https://stackoverflow.com/users/1087721/billyonecan">billyonecan</a> to use <code>closest("tr")</code> instead of <code>parents("tr:eq(0)")</code> or <code>parents("tr").first()</code></p> <pre><code>$(document).ready(function() { // Again using event delegation to bind events // efficiently, this time using the one method $(".vraagrij").one("change", "select", function(e) { // Perform the action for the changed // select $(this).closest("tr").find("input").css("color", "yellow"); }); }); </code></pre>
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    1. USStuart Wakefield
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    1. CO+1 for the third method, probably the best solution here. You could use `$(this).closest('tr')` by the way, instead of `.parents('tr:eq(0)')`
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      1. USbillyonecan
    2. COBoth the `select` and `input` elements have a relative attribute - they both use the same `name`. There's no need to use `.find()`, `.closest()` (or `.parent()`, as some of the other answers here are using).
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      1. USJames Donnelly
    3. COHi James, one of the selects has the same name, your answer will not work for the other select in the row, nor will ensure a single change event **per row** as the OP asked.
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      1. USStuart Wakefield
 

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