function mvStart(evnt) {
                if (!evnt) evnt = window.event;
                if (!window.addEventListener) { window.document.attachEvent('onselectstart', function() { return false; } ); }
                w2popup.status = 'moving';
                tmp.resizing = true;
                tmp.x = evnt.screenX;
                tmp.y = evnt.screenY;
                tmp.pos_x = $('#w2ui-popup').position().left;
                tmp.pos_y = $('#w2ui-popup').position().top;
                w2popup.lock({ opacity: 0 });
                $(document).on('mousemove', tmp.mvMove);
                $(document).on('mouseup', tmp.mvStop);
                if (evnt.stopPropagation) evnt.stopPropagation(); else evnt.cancelBubble = true;
                if (evnt.preventDefault) evnt.preventDefault(); else return false;
            }
*********************************************************************
  Library: Web 2.0 UI for jQuery (using prototypical inheritance)
  - Following objects defined
       - w2popup      - popup widget
       - $().w2popup  - jQuery wrapper
  - Dependencies: jQuery, w2utils

== NICE TO HAVE ==
  - transition should include title, body and buttons, not just body

**********************************************************************