1.js
ts.js:
function a(){
b();
}
function b(){
var heads=document.getElementByTagName("head").item(0);
var sc=document.createElement("script");
sc.src="/servletTest.do?t1=app";
sc.type="text/script";
heads.append(sc);
}
test.jsp
<head>
<script type="text/javaScript" src="ts.js"></script>
<script>
a();
</script>
</head>
<body>
<div></div>
</body>