Question

用原生js怎么动态添加一个js文件

Answer 1

1、直接document.write
<script language="javascript">
document.write("<script src='http://web.zhaicool.net/jquery.js'><\/script>");
</script>

2、动态改变已有script的src属性
<script src='' id="s1"></script>
<script language="javascript">
s1.src="http://web.zhaicool.net/jquery.js"
</script>

3、动态创建script元素
<script>
var oHead = document.getElementsByTagName('HEAD').item(0);
var oScript= document.createElement("script");
oScript.type = "text/javascript";
oScript.src="http://web.zhaicool.net/jquery.js";
oHead.appendChild( oScript);
</script>
其实原理就是利用dom动态的引入一个js到文件中来~就能和原有的js通信了~

Answer 2

这是个老问题了方法有：
1、直接document.write
<script language="javascript">
document.write("<script src='test.js'><\/script>");
</script>

2、动态改变已有script的src属性
<script src=''1.js"id="s1"></script>
<script language="javascript">
s1.src="test.js"
</script>

3、动态创建script元素
<script>
var oHead = document.getElementsByTagName('HEAD').item(0);
var oScript= document.createElement("script");
oScript.type = "text/javascript";
oScript.src="test.js";
oHead.appendChild( oScript);
</script>