closing window

hi to all.
i hiave a slight problem, ive vritten some code, which opens a download box with needed to download file.
code looks like this:
echo "<script>location='somefile.zip'</script>";
so, this code works ok, but now i need the this window to close after 5seconds. how to do this?
please help, im stuck

[edit: moved by notepad]

<script type="text/javascript">setTimeout('window.close()', 5000);</script>