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    <p>I hope you don't mind but I created a <a href="http://jsfiddle.net/8q6M6/" rel="nofollow">jsFiddle Abstraction</a> for ensuring all children being checked toggles the parent to checked, rather than modifying your code exactly to give you an idea of one approach you might use.</p> <pre><code>&lt;div class="parentDiv"&gt; &lt;input type="checkbox" class="parent"/&gt; &lt;div class="childGroup"&gt; &lt;input type="checkbox" class="child"/&gt; &lt;input type="checkbox" class="child"/&gt; &lt;input type="checkbox" class="child"/&gt; &lt;/div&gt; &lt;/div&gt; </code></pre> <p>Then you can use this jQuery to ensure your parent selects/deselects when the child group changes.</p> <pre><code>$('.child').on('change', function () { var $parent = $(this).closest('.parentDiv').find('input.parent'), $childCheckboxes = $(this).closest('.childGroup').find('.child'); if ( $childCheckboxes.length === $childCheckboxes.filter(':checked').length ) { $parent.prop('checked', true); } else { $parent.prop('checked', false); } }); </code></pre> <p>and to <a href="http://jsfiddle.net/5xbcu/" rel="nofollow">toggle all children on parent toggle</a>:</p> <pre><code>$('.parent').on('change', function () { var $children = $(this).closest('.parentDiv').find('.child'); $children.prop('checked', $(this).is(':checked')); }); </code></pre> <p>Per your request, I've tried to put this into the context of your check_subgroups function:</p> <pre><code>function check_subgroups(parent_id, class_name) { $parent = $('#' + parent_id); $childCheckboxes = $('.' + $.trim(class_name)); $childCheckboxes.prop('checked', $parent.is(':checked')); } </code></pre> <p>And to toggle the parent when all children are selected: </p> <pre><code>function uncheck_main_group(parent_id) { var $parent = $('#' + parent_id); var $children = $('.class_' + $.trim(parent_id)); if ( $children.length === $children.filter(':checked').length ) { $parent.prop('checked', true); } else { $parent.prop('checked', false); } } </code></pre>
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    1. POHow to make the checkbox working properly in following scenario?
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    1. COThanks for your answer. It's working fine. But when I check the parent checkbox, all its corresponding child checkboxes are not getting checked. Only this issue is there otherwise it's working fine. Can you improvize your solution in order to achieve this.
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    2. COI've updated with the toggle all code, hope this helps.
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    3. COCan you provide me the javascipt code for this, please?
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