1、定义全局变量

<script language="javascript">
var g = "I'm here";
</script>
<script tpye="text/javascript" src="test.js"></script>

处理： 

alert(g);

2、在src后面传参

<script tpye="text/javascript" src="test.js?a=1&b=2" id="testjs"></script>

处理：

var src=d.getElementById("testjs").getAttribute("src"),result="";
if(src){
 var r = src.substr(1).match(new RegExp('(^|&?)' + 'id'+ '=([^&]*)(&|$)', 'i'));
  result= null?decodeURI(r[2]):'';
}
alert(result);

3、检索js文件（js文件要最后引入）

<script tpye="text/javascript" src="test.js">
 var temp = "just test";
</script>

处理：

var script = document.getElementsByTagName("script");
eval(script[script.length-1].innerhtml);
alert(temp);

4、设置其他属性

<script id="testScript" type="text/javascript" src="test.js" data="a=b&c=d"></script>

处理：

var scriptArgs = document.getElementById('testScript').getAttribute('data');

链接: https://www.fly63.com/article/detial/1964