Say I had 2 JavaScript files, f1.js and f2.js respectively and one HTML page called index.html.

I use the script tag to use the code from f1.js in my index.html. But, I want f1.js to use some code from f2.js. So, the hierarchy is like this -
index.html <--- f1.js <--- f2.js.

i.e. f2.js is a pseudo-random generator and has a function which creates a random seed, and I want to use this in my code for f1.js.

Code example:

index.html - how I call f1.js in the html page (my code)

```
<script type="text/javascript" src="f1.js">
</script> 

```

f1.js - my code

```
function hello() {
    Math.seedrandom("1"); // this is the method I want to reuse from f2.js
    alert("hello: " + Math.random());
}

```

f2.js - code I want to use (via the link below)

```
Math.seedrandom();

```

How can I do this? 

Edit: the file I want to reuse can be found her - <http://davidbau.com/encode/seedrandom.js>

It's a custom random seed generator tool which has a function: Math.seedrandom("") that I want to use.