Index: src/timeline.c
==================================================================
--- src/timeline.c
+++ src/timeline.c
@@ -649,13 +649,13 @@
       cgi_printf("],h:\"%s\"}%s", pRow->zUuid, pRow->pNext ? ",\n" : "];\n");
     }
     cgi_printf("var nrail = %d\n", pGraph->mxRail+1);
     graph_free(pGraph);
     @ var canvasDiv = gebi("canvas");
-    @ var canvasStyle = window.getComputedStyle(canvasDiv,null);
-    @ var lineColor = canvasStyle.getPropertyValue('color') || 'black';
-    @ var bgColor = canvasStyle.getPropertyValue('background-color') || 'white';
+    @ var canvasStyle = window.getComputedStyle && window.getComputedStyle(canvasDiv,null);
+    @ var lineColor = (canvasStyle && window.getComputedStyle(canvasDiv,null).getPropertyValue('color')) || 'black';
+    @ var bgColor = (canvasStyle && canvasStyle.getPropertyValue('background-color')) || 'white';
     @ if( bgColor=='transparent' ) bgColor = 'white';
     @ var boxColor = lineColor;
     @ function drawBox(color,x0,y0,x1,y1){
     @   var n = document.createElement("div");
     @   if( x0>x1 ){ var t=x0; x0=x1; x1=t; }