Multiple checkbox selection using JQuery

JQuery multiple checkbox selection is quite easy, simply put the following code and amend according to your choice

$("#maincheckbox").click(function() {
    $("input[type=checkbox]").attr("checked", this.checked);
});
 
$("input[rel=default]").click(function(){
    if($("input[rel=default]").length == $(".case:checked").length) {
        $("#maincheckbox").attr("checked", "checked");
    } else {
        $("#maincheckbox").removeAttr("checked");
    }
});