chrome firefox控制檯引用jquery

//建立一個script標籤
var importJS = document.createElement("script");
//設置屬性
importJS.setAttribute("type","text/javascript");
importJS.setAttribute("src","http://code.jquery.com/jquery-latest.js");
//獲取head
var head = document.getElementsByTagName("head")[0];
//添加script標籤到head
head.appendChild(importJS);