Get Checked and Unchecked Value from Checkbox Contron inJQUery

function createArrayOfSelected(UpdateOrDelete)
{
    var returnArrayObj = new Array();
    if (UpdateOrDelete == "Update")
    {
        $('#tablePredecessorsList tbody tr td input[type="checkbox"]:checked').each(function(i, row)
        {
            returnArrayObj.push($(this).val());
        });
    }
    else if (UpdateOrDelete == "Delete")
    {
        $('#tablePredecessorsList tbody tr td input[type="checkbox"]:not(:checked)').each(function(i, row)
        {
            returnArrayObj.push($(this).val());
        });
    }
    return returnArrayObj;
}