Redirect from RoundCube to a new webpage

[jmarais]

I have a plugin that performs a specific task. I want the user to be redirected to another page on my website but when I use the standrd redirect methods, I get an error. One that I tried is the following:
echo "<script>document.location.href='".$url."';</script>\n";

Which method can I use to take the user to an external page?

Thanks

[oldschool]

Is an iframe an option?

Rgds.

[jmarais]

Actually iframe is the preferred option