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copied!<p>I think some error comes from these lines:</p> <pre><code>var array = $.parseJSON(response.new_list); </code></pre> <p>returns a well formatted Javascript object but when you are comparing with</p> <pre><code>if($('#checkKeywords :input') == array){...} </code></pre> <p>You're comparing a set of Javascript objects with well formatted JSON parsed JS objects which are not quite compatible with the value returned from <code>$('#checkKeywords :input') == array</code>.</p> <blockquote> <p>If both operands are objects, they're compared as objects, and the equality test is true only if both refer the same object. <a href="https://developer.mozilla.org/en/JavaScript/Reference/Operators/Comparison_Operators" rel="nofollow">MDN Docs</a></p> </blockquote> <hr> <p>I would suggest to make the two objects comparable using some modification which will take the two objects and process them to return <code>true</code> or <code>false</code> according to whether the are equal.</p> <p><strong>Update</strong>:</p> <p>In your <strong>HTML code</strong></p> <pre><code><td> <input type="checkbox" id="validate" name="cb" value="{{keyword.keyword_name}}" />{{keyword.keyword_name}} </td> </code></pre> <p>From your <strong>JS</strong></p> <pre><code>... $.each(array, function(i, item) { html += "<li>" + item + "</li>"; theinputs = $('#checkKeywords :input') $.each(theinputs, function(i, checkbox) { if ($(checkbox).val() == item) { $(checkbox).prop('disabled', true); /* thanx charlietfl */ } }); }); $('#keywords').append(html); ... </code></pre>

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