87,955
社区成员
![](https://csdnimg.cn/release/cmsfe/public/img/topic.427195d5.png)
![](https://csdnimg.cn/release/cmsfe/public/img/me.40a70ab0.png)
![](https://csdnimg.cn/release/cmsfe/public/img/task.87b52881.png)
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<script type="text/javascript" >
window.onload=function(){
fun_2();
}
function fun_1(num) {
if (num == 1)
return 1
else
return num * fun_1(num - 1)
}
function fun_2() {
var num = prompt("请输入一个整数:")
alert(fun_1(num))
}
</script>
不需要homework.js<script type="text/javascript" src="homework.js"></script>
二、在页面调用函数
<body>
<script type="text/javascript">
fun_2();
</script>
</body>
这样应该可以