How to navigate to page outside the domain by code?

How to navigate to page outside the domain by code?

In a jquery mobile app I build a full http url in code to an external site (eg. wikipedia) and want to navigate there. I have tried :

    window.open(url);
    window.navigate(url);
    $.mobile.changePage(url);
    $.mobile.loadPage(url);

But none of these work on my ipod touch in Safari (some work in a browser on the PC). I want the page just to go to the url, not load it into the jquery mobile page's DOM, exactly as if an external link was clicked on the page, either in the same window (so the back button will go back to my jquery mobile page), or in a new window.

How to do it?