JS defines carriage return event (implementation code)_javascript skills

Copy code The code is as follows:

$(function () {
                                           Enter event
if (document.addEventListener) {//If it is Firefox
document.addEventListener("keypress", fireFoxHandler, true);
}
else {
document.attachEvent( "onkeypress", ieHandler);
           }

function fireFoxHandler(evt) {

if (evt.keyCode == 13) {

                  $("#btnLogin"                                                                                                                                                                                                                                                                        ​ 
                                                                                                                                      🎜> });