[jQuery] if opera...... else

[jQuery] if opera...... else


Hi,
I would like to output the followin content if the browser isn't
opera:
         <ul id="navigation">
             <li class="homelink" onclick="homeSlide()">home</li>
             <li class="aboutlink" onclick="aboutSlide()">about</li>
             <li class="portfoliolink" onclick="portfolioSlide
()">portfolio</li>
             <li class="serviceslink" onclick="servicesSlide()">services</
li>
             <li class="contactlink" onclick="contactSlide()">contact</
li>
    </ul>
If the browser is opera I would like to output something slightly
different.
How would I do this?
Thanks!