อยากได้โค๊ด this.form.submit() dropdown 2 select ยกตัวอย่างจาก administrator ของ Joomla ครับ

<td nowrap="nowrap">
	        <select onchange="this.form.submit()" size="1" class="inputbox" id="filter_type" name="filter_type">
                <option selected="selected" value="0">- Select Group -</option>
                <option value="Public Frontend"> Public Front-end</option>
                <option value="Registered">Registered</option>
                <option value="Author">Author</option>
                <option value="Editor">Editor</option>
                <option value="Publisher">Publisher</option>
                <option value="Public Backend"> Public Back-end</option>
                <option value="Manager">Manager</option>
                <option value="Administrator">Administrator</option>
                <option value="Super Administrator">Super Administrator</option>
            </select>			
               	
            <select onchange="this.form.submit()" size="1" class="inputbox" id="filter_logged" name="filter_logged">
                <option selected="selected" value="0">- Select Log Status -</option>
                <option value="1">Logged In</option>
            </select>
</td>