[jQuery] “(validate)”

[Søren gruby]

I'm using the jQuery plugin: Validation.

How can I validate, say a textbox inside a specific div element that
has a specific id?

$(document).ready(function() {
            $("#aspnetForm").validate({
                rules: {
                   txt_1: {
                        minlength: 2,
                        required: true
                    },
                    txt_2: {
                        required: true,
                        email:true
                    }
                }, messages: {}
            });
        });

I have a textbox in a div with an id = "testdiv" and the above code
doesn't seem to locate the textbox.

Thanks