X-Git-Url: https://git.ladys.computer/Gitweb/blobdiff_plain/169c1428a0ed03a1418c9a07b29cdf7b28195c6eb283e094a6fc8bf63e27a110..5f41702296a6412c8ad69a57f4771701fdfd4d257cc0dc1dfeea1a505ff2c25c:/static/js/lib/common-lib.js

diff --git a/static/js/lib/common-lib.js b/static/js/lib/common-lib.js
index 09448ed..bd091b3 100644
--- a/static/js/lib/common-lib.js
+++ b/static/js/lib/common-lib.js
@@ -64,7 +64,7 @@ function padLeft(input, width, ch) {
 
 
 /* ............................................................ */
-/* Ajax */
+/* Handling browser incompatibilities */
 
 /**
  * Create XMLHttpRequest object in cross-browser way
@@ -88,6 +88,31 @@ function createRequestObject() {
 }
 
 
+/**
+ * Insert rule giving specified STYLE to given SELECTOR at the end of
+ * first CSS stylesheet.
+ *
+ * @param {String} selector: CSS selector, e.g. '.class'
+ * @param {String} style: rule contents, e.g. 'background-color: red;'
+ */
+function addCssRule(selector, style) {
+	var stylesheet = document.styleSheets[0];
+
+	var theRules = [];
+	if (stylesheet.cssRules) {     // W3C way
+		theRules = stylesheet.cssRules;
+	} else if (stylesheet.rules) { // IE way
+		theRules = stylesheet.rules;
+	}
+
+	if (stylesheet.insertRule) {    // W3C way
+		stylesheet.insertRule(selector + ' { ' + style + ' }', theRules.length);
+	} else if (stylesheet.addRule) { // IE way
+		stylesheet.addRule(selector, style);
+	}
+}
+
+
 /* ............................................................ */
 /* Support for legacy browsers */