MediaWiki:Common.js/navigationbars.js

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// ============================================================
// BEGIN Dynamic Navigation Bars (experimantal)
// This script is from Wikipedia. For author attribution,
// please see http://en.wikipedia.org/w/index.php?title=MediaWiki:Common.js&action=history
// COPIED FROM RUNESCAPE WIKI. http://runescape.wikia.com/
// ============================================================


/* Test if an element has a certain class **************************************
 *
 * Description: Uses regular expressions and caching for better performance.
 * Maintainers: User:Mike Dillon, User:R. Koot, User:SG
 */

var hasClass = (function () {
    var reCache = {};
    return function (element, className) {
        return (reCache[className] ? reCache[className] : (reCache[className] = new RegExp("(?:\\s|^)" + className + "(?:\\s|$)"))).test(element.className);
    };
})();