在Chrome Console中加载jQuery

var jq = document.createElement('script');
jq.src = "//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js";
document.getElementsByTagName('head')[0].appendChild(jq);
// ... give time for script to load, then type.
jQuery.noConflict();

https://developers.google.com/speed/libraries/devguide?hl=zh-CN

用google的cnd