HighCharts 3.0.4 IE8 createStyleSheet() fix

highcharts-3.0.4-ie8-fix.patch

--- highcharts-3.0.4.js 2013-08-15 17:18:55.000000000 +0100
+++ highcharts.js       2013-09-16 17:03:19.000000000 +0100
@@ -5056,11 +5056,22 @@
 
                        doc.namespaces.add('hcv', 'urn:schemas-microsoft-com:vml');
 
-                       // setup default css
-                       doc.createStyleSheet().cssText =
-                               'hcv\\:fill, hcv\\:path, hcv\\:shape, hcv\\:stroke' +
-                               '{ behavior:url(#default#VML); display: inline-block; } ';
+                       // Setup default css 
+                       var styleSheet;
+                       var hcvSelector = 'hcv\\:fill, hcv\\:path, hcv\\:shape, hcv\\:stroke';
+                       var hcvStyle = 'behavior:url(#default#VML); display: inline-block;';
 
+                       // Append rules to existing stylesheet if one exists to avoid hitting IE's
+                       // limit of 31 stylesheets per page
+                       if (doc.styleSheets.length > 0) {
+                               styleSheet = doc.styleSheets[0];
+                       } else {
+                               styleSheet = doc.createStyleSheet();
+                       }
+
+                       // Use .cssText rather than .addRule since .addRule breaks in quirks
+                       // mode when using escaped selectors
+                       styleSheet.cssText += hcvSelector + '{' + hcvStyle + '}';
                }
        },