jquery select all checkboxes

Question

I have a series of checkboxes that are loaded 100 at a time via ajax.

I need this jquery to allow me to have a button when pushed check all on screen. If more are lo

Answer 1

try this

var checkAll = function(){  
var check_all = arguments[0];
var child_class = arguments[1];
if(arguments.length>2){
    var uncheck_all = arguments[2];

    $('#'+check_all).click(function (){
        $('.'+child_class).attr('checked', true);
    });

    $('#'+uncheck_all).click(function (){
        $('.'+child_class).attr('checked', false);
    });

    $('.'+child_class).click(function (){
        var checkall_checked = true;
        $('.'+child_class).each(function(){
            if($(this).attr('checked')!=true){
                checkall_checked = false;
            }
        });
        if(checkall_checked == true){
            $('#'+check_all).attr('checked', true);
            $('#'+uncheck_all).attr('checked', false);
        }else{
            $('#'+check_all).attr('checked', false);
            $('#'+uncheck_all).attr('checked', true);
        }
    });
}else{
    $('#'+check_all).click(function (){
        $('.'+child_class).attr('checked', $(this).attr('checked'));
    });

    $('.'+child_class).click(function (){
        var checkall_checked = true;
        $('.'+child_class).each(function(){
            if($(this).attr('checked')!=true){
                checkall_checked = false;                   
            }
        });
        $('#'+check_all).attr('checked', checkall_checked);
    });
}
};

To "check all" and "uncheck all" is same checkbox

checkAll("checkall_id", "child_checkboxes_class_name");

To "check all" and "uncheck all" is separate checkbox

checkAll("checkall_id", "child_checkboxes_class_name", "uncheckall_id");