Only load tag information if necessary

htroot/interaction_elements/Tag_part.html

@@ -40,15 +40,19 @@ color: #5a346e;
 	
 	var existingtags = "";
 	
+	var resultstring = "";
+	
+	if (vocabularies_string != "") {
+
 		$.ajaxSetup({async: false});
 	
-	var resultstring = "";
+	
 
 		$.getJSON('/currentyacypeer/api/yacydoc.htm?urlhash=#[hash]#', function(data) {
 
 			resultstring = data.result;
 		});
-
+	}