if (!document.getElementsByClassName) {
    document.getElementsByClassName = function(className, tag, elm){
        var testClass = new RegExp("(^|\\s)" + className + "(\\s|$)");
        var tag = tag || "*";
        var elm = elm || document;
        var elements = (tag == "*" && elm.all)? elm.all : elm.getElementsByTagName(tag);
        var returnElements = [];
        var current;
        var length = elements.length;
        for(var i=0; i<length; i++){
            current = elements[i];
            if(testClass.test(current.className)){
                returnElements.push(current);
            }
        }
        return returnElements;
    }
}

jQuery.noConflict()