Wt

// slightly modified, based on: http://www.hunlock.com/blogs/Totally_Pwn_CSS_with_Javascript

this.getCssRule = function(selector, deleteFlag) {

//  selector = selector.toLowerCase(); // only used from within Wt, so case is allways exact matching

  deleteFlag = deleteFlag == 'delete';

   if (document.styleSheets) {

      for (var i = 0; i < document.styleSheets.length; i++) {

         var styleSheet = document.styleSheets[i];

         try {

            var rules = styleSheet.cssRules;

            if (!rules) rules = styleSheet.rules;

            // the items we are looking for are mostly at the ende of the stylesheet

            for (var ii = rules.length -1; ii > -1; ii--) {

               var rule = rules[ii];

               if (rule && rule.selectorText) {

//                if (rule.selectorText.toLowerCase() == selector) { // only used from within Wt, so case is allways exact matching

                  if (rule.selectorText == selector) {

                     if (deleteFlag) {

                        if (styleSheet.deleteRule) styleSheet.deleteRule(ii);

                        else styleSheet.removeRule(ii);

                        return true;

                     }

                     return rule;

                  }

               }

            }

         }

         catch (err) {

            // firefox security error 1000 when access a stylesheet.cssRules hosted

            // from another domain

         }

      }

   }

  return false;

};