Call navigation pootal from a JSP

Hello,

I have an JSP which is running into an iview of my portal.

In this one, I need to create a link which, on a click, navigates to the portal navigation to open the associated page.

For example, I have done it with a Portal component: using

<a href="#" onclick="return EPCM.doNavigate('ROLES://portal_content/every_user/...')">

Navigate

</a>

But in my case, now I would to di it outside a portal component, in a simple JSP file used as URL iView.

As somebody an idea ?

Thanks,

Fabien