Gitweb: make line number toggling work for Firefox and Safari

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

gitweb/gitweb.perl

@@ -4562,7 +4562,9 @@ sub git_print_page_path {
                 e2.innerHTML = "[Hide line numbers]";
         }
 }
-document.getElementsByTagName("head")[0].innerHTML += "<style id=\'lineNoStyle\'></style>";
+var style = document.createElement("style");
+style.setAttribute("id", "lineNoStyle");
+document.getElementsByTagName("head")[0].appendChild(style);
 toggleLineNumbers();
 </script>
 ';