$(document).ready(function(){

	  $("#login").validate({
			rules: {
				username: { required: true },
	  			password: { required: true, minlength: 4 }
			},
			messages: {
				username: { required: "Username required" },
				password: { required: "Password required", minlength: "Min-length of 4" }
			}
		});
	  
	});