if(dwr==null){var dwr={}}if(dwr.engine==null){dwr.engine={}}if(DWREngine==null){var DWREngine=dwr.engine}if(previewService==null){var previewService={}}previewService._path="/dwr";previewService.registerPreview=function(b,a){dwr.engine._execute(previewService._path,"previewService","registerPreview",b,a)};