1. JS:
2. jQuery:
参考网址：
https://stackoverflow.com/questions/13831601/disabling-and-enabling-a-html-input-button
https://stackoverflow.com/questions/1414365/disable-enable-an-input-with-jquery
标签：jQuery,enable,elment,JS,disable,questions From： https://www.cnblogs.com/keeplearningandsharing/p/17672584.html