function switch_descriptions(){
    jQuery('#tmp_product_description > div').each(function(){
        var object=jQuery(this);
        object.css('display',(object.css('display')=="none" ? "block" : "none"));
    });
}

jQuery(document).ready(function(){
    jQuery('#tmp_product_description > div').css('display','none');
    jQuery('#tmp_product_description #tmp_product_general').css('display','block');
});