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Mark all checkboxes based using one checkbox 





<html>

<body>

<label ><b>Year*</b></label>

<input type="checkbox" id='year' class="yearcheckall" value="0"><b>All</b>

<input type="checkbox" name="year[]" class="year" value="1" required> 1st Year

<input type="checkbox" name="year[]" class="year" value="2" required> 2nd Year

<input type="checkbox" name="year[]" class="year" value="3" required> 3rd Year

<input type="checkbox" name="year[]" class="year" value="4" required> 4th Year

</body>

</html>



<script type = "text/javascript" src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

<script>

    $('.yearcheckall').on('click', function() {

        $('.year').prop('checked', this.checked)

    });

</script>

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