Mootools on blur search box and submit

<script type="text/javascript">
//<![CDATA[
    window.addEvent('domready', function() {
        var value;

        // Set the input value if not already set.
        if (!$('mod_finder_q45').getProperty('value')) {
            $('mod_finder_q45').setProperty('value', 'search...');
        }

        // Get the current value.
        value = $('mod_finder_q45').getProperty('value');

        // If the current value equals the previous value, clear it.
        $('mod_finder_q45').addEvent('focus', function() {
            if (this.getProperty('value') == value) {
                this.setProperty('value', '');
            }
        });

        // If the current value is empty, set the previous value.
        $('mod_finder_q45').addEvent('blur', function() {
            if (!this.getProperty('value')) {
                this.setProperty('value', value);
            }
        });

        $('mod-finder-45').addEvent('submit', function(e){
            e = new Event(e);
            e.stop();

            // Disable select boxes with no value selected.
            if ($chk($('mod-finder-45-advanced'))) {
                $('mod-finder-45-advanced').getElements('select').each(function(s){
                    if (!s.getProperty('value')) {
                        s.setProperty('disabled', 'disabled');
                    }
                });
            }

            $('mod-finder-45').submit();
        });

        /*
         * This segment of code sets up the autocompleter.
         */
    });
//]]>
</script>