web_float_limit/views/assets_backend.xml
<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data>
<template id="assets_backend" name="web sublist" inherit_id="web.assets_backend">
<xpath expr="." position="inside">
<script type="text/javascript" src="/web_float_limit/static/src/js/limit.js"></script>
</xpath>
</template>
</data>
</openerp>