Show Attribute Name in Select Box on an Configurable Product

configurable.phtml

    <script type="text/javascript">
        Product.Config.prototype.fillSelect = function(element){
            var attributeId = element.id.replace(/[a-z]*/, '');
            var options = this.getAttributeOptions(attributeId);
            this.clearSelect(element);
            element.options[0] = new Option('', '');
            element.options[0].innerHTML = this.config.attributes[attributeId].label + ' <?php echo $this->__('Choose') ?>';

            var prevConfig = false;
            if(element.prevSetting){
                prevConfig = element.prevSetting.options[element.prevSetting.selectedIndex];
            }

            if(options) {
                var index = 1;
                for(var i=0;i<options.length;i++){
                    var allowedProducts = [];
                    if(prevConfig) {
                        for(var j=0;j<options[i].products.length;j++){
                            if(prevConfig.config.allowedProducts
                                && prevConfig.config.allowedProducts.indexOf(options[i].products[j])>-1){
                                allowedProducts.push(options[i].products[j]);
                            }
                        }
                    } else {
                        allowedProducts = options[i].products.clone();
                    }

                    if(allowedProducts.size()>0){
                        options[i].allowedProducts = allowedProducts;
                        element.options[index] = new Option(this.getOptionLabel(options[i], options[i].price), options[i].id);
                        if (typeof options[i].price != 'undefined') {
                            element.options[index].setAttribute('price', options[i].price);
                        }
                        element.options[index].config = options[i];
                        index++;
                    }
                }
            }
        };
        var spConfig = new Product.Config(<?php echo $this->getJsonConfig() ?>);
    </script>