console.log('DOMContentLoaded');
document.addEventListener('DOMContentLoaded', function() {
    var buttonGenerate = document.getElementById('button_generate');
    var clickedOnce = false;  // 用来追踪按钮是否被点击过一次

    buttonGenerate.addEventListener('click', function() {
        if (!clickedOnce) {
            this.innerText = 'Redo';
            clickedOnce = true;  // 更新状态为已点击
        }
    });
});