jquery validator does the submission even it's invalid

jquery validator does the submission even it's invalid

I am writing a form with jquery.validate the roles work on keyup but don't work on onblur. and if the form fields were invalid and hit submit it works and submit 
  2. $('#myform').validate({ 
  3.             rules: {
  4.                 name: {
  5.                     required: true,
  6.                     minlength: 2
  7.                 },
  8.                 code: {
  9.                     required: true,
  10.                     minlength: 2
  11.                 },
  12.                 description: {
  13.                     require: true
  14.                 },
  15.                 credit: {
  16.                     required: true,
  17.                     number: true,
  18.                     range: [1,5]
  19.                 }
  20.             },
  21.             messages: {
  22.                 name: "Please Enter The Course Name",
  23.                 description:"Please Enter The Course Description",
  24.                 code: "Please Enter The Course credit",
  25.                 credit: {
  26.                     required:"Please Enter The Course Code",
  27.                     number: " Must be a number.",
  28.                     range: "Must be between 1 and 5."
  29.                      }
  30.                  } 
  31.         });