Question

HTML CODE:

<form id="myform">
 <input type='checkbox' name='foo[]' value='1'>
 <input type='checkbox' name='foo[]' checked='true' value='2' >
 <input type='checkbox' name='foo[]' value='3' >
 <input type='checkbox' name='foo[]' checked='true' value='4' >
</form>

JS CODE:

$('input[name=foo]:checked').each(function(i,el){
    if(clusterVal == 'ALL')
        {
            /* what do I have to do here? */
        }
    array.push($(el).val());
});

how to check/uncheck checkbox by using value in query

Answer 1

As of jQuery 1.6, the .prop() method provides a way to explicitly retrieve property values, while .attr() retrieves attributes.

try this ..but this to just demo how to do check and uncheck

DEMO

 $(function(){
        var el=$('input:checkbox[name="foo[]:checked"]');

        el.each(function()
          {
                         $(this).prop('checked', true);
          });
    });