<script>
    function show() {
        if(document.getElementById('benefits').style.display=='none') {
            document.getElementById('benefits').style.display='block';
        }
        return false;
    }
    function hide() {
        if(document.getElementById('benefits').style.display=='block') {
            document.getElementById('benefits').style.display='none';
        }
        return false;
    }
</script>