CKEDITOR validation

CKEDITOR validation

Hi,
 
I have 3 textarea with required attribute. in that 2 textarea having  ckeditor attached. I need to validate using jquery. How i will do that
 
i tried below code it is not working.
$("#next").click(function(e){

    e.preventDefault();
    CKEDITOR.instances.field1.updateElement(); 
    CKEDITOR.instances.field2.updateElement(); 



    $('#form').validate({
    rules: {
    field1: {
            required: true
        },
field2: {
            required: true
        },
    field3: {
            required: true
        },


     },
    errorPlacement: function(){

    alert("empty field");
        return false;
    }
    });