I've made an update to DataBridge so that you can do validation on html editor fields. Just reinstall the latest version and update the jquery validation script and htmleditor code.
You will still have to manually add the validation code to the html editor instance for now. In the code just before the line that reads:
add lines like:
$CKEditor_config["props"] = array();
$CKEditor_config["props"]["required"] = true;
$CKEditor_config["props"]["min"] = 20;
$CKEditor_config["props"]["max"] = 1000;
min and max are optional and can be used to set the number of characters allowed.
The effected files that need to be updated are:
I've also attached them in a .zip so you can replace them without having to re-apply any of the code in Dreamweaver.