$("form").submit(function () {

             console.log("提交了");

             $("input:submit").attr("disabled", "true");

             setTimeout(function () {

                 $("input:submit").removeAttr("disabled");

             }, 3000);

         });

 // jQuery plugin to prevent double submission of forms

 jQuery.fn.preventDoubleSubmission = function() {

   $(this).on('submit', function(e) {

     var $form = $(this);

     if ($form.data('submitted') === true) {

       // Previously submitted - don't submit again

       e.preventDefault();

     } else {

       // Mark it so that the next submit can be ignored

       $form.data('submitted', true);

     }

   });

   // Keep chainability

   return this;

 };

 //Use it like this

 $('form').preventDoubleSubmission();