fix

stmms-web/src/main/webapp/static/mark-new/js/modules/sheet-view.js

@@ -50,6 +50,8 @@ SheetView.prototype.init = function() {
 
 SheetView.prototype.render = function(urls) {
 	var self = this;
+	self.container.header.find('.image-switch').empty();
+	self.container.content.empty();
     if (urls != undefined && urls.length > 0) {
         for (var i = 0; i < urls.length; i++) {
         	var url = urls[i];