[рони]

evtyshenkosemen,

var  count = 3,
      rules = {};
      rules['cost_'+count] = {
				required: true,
				digits: true,
				minlength: 1,
				maxlength: 10
			};
      rules['name_'+count] = {
				required: true,
				only_allowed_characters:
				true, minlength: 3,
				maxlength: 20
			}
      rules['description_'+count] = {
				required: true,
				only_allowed_characters: true,
				minlength: 20,
				maxlength: 200
			};
      $("#bonuses").validate({'rules': rules })