var elementHasClassName = function(element, className) {
    var has_classname = false;
    var all_classes = element.className.split(' ');
    var il = all_classes.length;
    for(var i = 0; i<il; i++) {
        var current_class = all_classes[i];
        if(current_class.indexOf(className) != -1) {
            has_classname = true;
        }
    }
    return has_classname;
};