$(document).ready(function(){
$('#newsletter_form').ajaxForm({
	dataType:  'json',
	success: function(results) {
      if (results.error) {
		$("#newsletter_error").attr("innerHTML", results.error);
	 }  
	  else if (results.success) {
		$("#newsletter_error").attr("innerHTML", results.success);
		$("#newsletter_email").attr("value", "");
	  }
 }
 });
});

	function clearField(obj,def) {
				if (obj.value==def) obj.value = '';
		}	

		function writeField(obj, def) {
			if (obj.value=='') obj.value = def;
		}