[jQuery] Replace html class with rel attribute into an anchor

[Andrea - Aosta]

I need to replace an attribute inside a tag <a...
I have this code html

<a href="url.html" class="iframe" >Link</a>

And, for all link with iframe class, i need to have

<a href="iframe.html" rel="myrel" > Link </a>

I have try with


        $(".iframe").append("rel='highslide-iframe'");

but this append outside the <a...

I think this is better:

$(".iframe").replaceWith("rel='highslide-iframe'");

but how to set a replace saving the url target?
Thank you