in view

                  <input calss="only-numeric">
                

in jquery

                $(".only-numeric").bind("keypress", function (e) {

                              var keyCode = e.which ? e.which : e.keyCode;     

                              if (!(keyCode >= 48 && keyCode <= 57)) {

                                  $(".error").css("display", "inline");

                                  return false;

                              }else{

                                  $(".error").css("display", "none");

                              }

                      });