$(document).ready(function(){
	$('button[name="newsletterSubmit"]').click(function () { 
		tb_show('Sign Up for our Lindt Lover Newsletter','campaign_add.php?hide_header_footer=1&campaign_add=1&email_address='+this.form.email_address.value+'&TB_iframe=true&width=600','');
		return false;
	});
});