parse javascript via simple html dom [duplicate]

Is there any way to return URL in this code via SIMPLE HTML DOM:

<div class="film">
<script type="text/javascript">

            jwplayer("myElement").setup({
                file: "http://images.example.com/system.mp4",
                image: "",
                width: 500
            });
</script>
</div>

I want to have this URL:

http://images.example.com/system.mp4