jquery check box checked

check box checked

   if($(".clschekbox").is(':checked')!=true)
    {
    alert("Please Select  Checkbox");
    }
    else
    {
     var clientid =[];
                $('input[name="clientid[]"]').each(function () {
                   if($(this).is(':checked')==true) {
                              clientid.push(this.value);   
                            }
                });
    }