function show_hide_text(divObj) {
    var div = divObj.parentNode.getElementsByTagName('div')[1];
    if (div.style.display == 'none') {
        div.style.display = 'block';
        divObj.innerHTML = "скрыть";
    } else {
        div.style.display = 'none';
        divObj.innerHTML = "показать";
    }
}