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copied!<p>The <code>change</code> event requires the following three things happen:</p> <ol> <li>Element gain focus</li> <li>Value change</li> <li>Focus blur from element</li> </ol> <p>If you are changing the value of an input programmatically, then you must manually trigger the <code>change</code> event via jQuery's <code>.trigger('change')</code> or the <code>.change()</code> shortcut.</p> <p>Ideally, you would modify the first function to trigger change:</p> <pre><code>$(document).ready(function () { $("input:radio").bind('click', function () { $("#image") .val($(this).val()) .trigger('change'); }); }); $(document).ready(function () { $('#image').bind('change', function () { var src = $(this).val(); $('#imagePreview').html(src ? '<img src="' + src + '">' : ''); }); }); </code></pre> <p>However, per your question text, you cannot change the first function as I have suggested. This being the case, there is no good option for you, IMO. You could set up a timing interval to poll the input for its value and trigger the <code>change</code> event if you notice that it is different from the last check, but that's just ugly. Regardless, you need to cause the change event to fire.</p> <p>Ugly:</p> <pre><code>//LEAVE FIRST FUNCTION ALONE $(document).ready(function () { var $imageInput = $("#image"), $imagePreview = $('#imagePreview'), lastVal; $imageInput.bind('change', function () { var src = $(this).val(); $imagePreview.html(src ? '<img src="' + src + '">' : ''); }); lastVal = $imageInput.val(); setInterval(function () { var currentVal = $imageInput.val(); if (currentVal !== lastVal) { $imageInput.trigger('change'); lastVal = currentVal; } }, 500); }); </code></pre>

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