diff --git a/trunk/html/user.html b/trunk/html/user.html
index 86b5be4c..643ca1e6 100644
--- a/trunk/html/user.html
+++ b/trunk/html/user.html
@@ -128,8 +128,8 @@ td.box6
 <script>
 	function marcacaoWindow()
 	{
-		wnd = window.open( "schedule", "marcacao_window", "menubar=0, resizeable=0, width=400, height=250, top=100, left=450" );
-		wnd.focus();
+		m_wnd = window.open( "schedule?" + Math.random(), "marcacao_window", "menubar=0, resizeable=0, width=400, height=250, top=100, left=450" );
+		m_wnd.focus();
 	}
 </script>
 <body>
