function send_search_form(){
    $('gquery').value = $('search-string').value;
    $('search').submit();
}
document.observe("dom:loaded", function(){
    $('search-string').observe('focus', function(e){
        $('search-string').value = '';
    });
    $('search-string').observe('blur', function(e){
        $('search-string').value = 'Search';
    });
    $('search-string').observe('keyup', function(e){
        if (e.keyCode == Event.KEY_RETURN) {
            send_search_form();
        }
    });
});