When you need to jump to a specific URL direct after you choosed a Statement from a Selectbox:

<select onchange=”window.open(this.options[this.selectedIndex].value,’_self’)”>

    <option value=”">Choose a Language…</option>

    <option value=”database.php?lang=en”>English</option>

    <option value=”database.php?lang=de”>Deutsch</option>

    <option value=”database.php?lang=id”>Italian</option>

    <option value=”database.php?lang=ru”>Russian</option>

</select>