// performance reasons
$(document).ready(function() {
    // click into searchform
    $('#s').click(function () {
        if($('#s').val() === 'Suchtext eingeben...') {
            $('#s').val('');
        }

    });
    // leaving focus of searchform
    $('#s').focusout(function () {
        if ($('#s').val() === '') {
            $('#s').val('Suchtext eingeben...');
        }
    });

});