Index: lams_central/web/css/chart.css
===================================================================
diff -u -r0cf0d00e80ef05535a52247a471dd7db8d566fac -r8d7332a908101db10e719593c2e6666247e5934f
--- lams_central/web/css/chart.css	(.../chart.css)	(revision 0cf0d00e80ef05535a52247a471dd7db8d566fac)
+++ lams_central/web/css/chart.css	(.../chart.css)	(revision 8d7332a908101db10e719593c2e6666247e5934f)
@@ -6,4 +6,15 @@
 	fill: none;
 	stroke: #000;
 	shape-rendering: crispEdges;
+}
+
+div.tooltip {	
+    position: absolute;			
+    padding: 2px;				
+    font: 12px sans-serif;		
+    background: #FFFFFF;
+    border: 0px;		
+    border-radius: 8px;			
+    pointer-events: none;
+	opacity: 0;
 }
\ No newline at end of file