function _enableMarkdown(sQuery){
        var waTarget = $(sQuery || "[markdown]"); // TODO: markdown=true

        waTarget.each(function(nIndex, elTarget){
            _isEditableElement(elTarget) ? _setEditor($(elTarget)) : _setViewer($(elTarget));
        });
    }
enableMarkdown on target elements

@param {String} sQuery Selector string for targets