javascript - 如何点击没有id的按钮

Question

我是初学者。我正在尝试单击网页上下面的按钮:

<span class="action-delete" onclick=";return false;"> Delete </span>

我尝试了下面的代码，但没有成功

document.getElementsByClassName('action-delete').click()

我使用的是greasemonkey和firefox

提前致谢

截图如下

Answer 1

var trigger = document.getElementsByClassName("action-delete");

for (var i = 0, len = trigger.length; i < len; ++i) {
    trigger[i].addEventListener("click", function (e) {
        alert(e.target.innerHTML);

    }, false);
}

<span class="action-delete">Click me</span>
<span class="action-delete">Hello World</span>
<span class="action-delete">Nice to meet you</span>

这是一个简单的演示 http://jsfiddle.net/6vs5m/