function populateCredentialsInputs(node, credDef, credData, prefix) {
        var cred;
        for (cred in credDef) {
            if (credDef.hasOwnProperty(cred)) {
                if (credDef[cred].type == 'password') {
                    if (credData[cred]) {
                        $('#' + prefix + '-' + cred).val(credData[cred]);
                    } else if (credData['has_' + cred]) {
                        $('#' + prefix + '-' + cred).val('__PWRD__');
                    }
                    else {
                        $('#' + prefix + '-' + cred).val('');
                    }
                } else {
                    preparePropertyEditor(credData, cred, prefix, credDef);
                }
                attachPropertyChangeHandler(node, credDef, cred, prefix);
            }
        }
    }
Assign the value to each credential field
@param node
@param credDef
@param credData
@param prefix