【JS】原生动态插入脚本函数

insert-script-function.js

function includeScriprt(url,fnback){
	var script = document.createElement("script");
	script.type="text/javascript";
	script.src = url;
	document.getElementsByTagName("body")[0].appendChild(script);

  function done(){
  	fnback();
  }
  script.onload = script.onreadystatechange = function(){ script.readyState ? script.readyState.toLowerCase() == 'loaded' && done() : done() };
}