Javascript submit from an RTE

You must fill the contents of the <textarea> element with the HTML from the RTE widget.  Something like this (where editor is the DlRteFrame widget):

function doSubmit() {
    // fill the <textarea>
    var ta = document.getElementById("id-of-textarea");
    ta.value = editor.getHTML();
    // submit now
    document.getElementById("id-of-form").submit();
}

and your link:

<a href="javascript:doSubmit()">

And if the editor isn't a global variable? Imagine I have several RTEs on a page. Can I look up an RTE by id?

function doSubmit() {
    var editor = ???;
    // fill the <textarea>
    var ta = document.getElementById("id-of-textarea");
    ta.value = editor.getHTML();
    // submit now
    document.getElementById("id-of-form").submit();
}

There are multiple solutions... it's completely up to you how you manage your variables.  Here's a possibility (it's probably not documented — sorry about this).  All widgets have an unique ID (automatically generated).  After you create the editor, you can save its ID in the textarea, and retrieve it later:

var rte = new DlRteFrame({ ... });
document.getElementById("id-of-textarea").rteID = rte.id;

// later...

var ta = document.getElementById("id-of-textarea");
var rte = DlWidget.getById(ta.rteID);
ta.value = rte.getHTML();

Note that instead of ID, you can actually save a reference to the widget itself.

Hope this helps.