Prototypejs 如何在原型上按类名获取div的html

我在JQuery工作之前，我有点不明白如何在原型上获得

的
asd

<div class="quote_content">
     <a>asd</a>
</div>


自闭症

谢谢

更新

我有一个函数可以做到这一点：

<script type="text/javascript">// <![CDATA[
function showCompare() {
    var quote_content = $$(".quote_content");
    win = new Window({className: "mac_os_x", title: "Sample", width:800, height:400, destroyOnClose: true, recenterAuto:false});

    win.getContent().innerHTML = quote_content;
    win.showCenter();
}
// ]]></script>

//

但是
quote\u content
输出是
[object htmldevelment]
首先需要知道的是，is class属性是在类名后用一个点来标识它，
在您的情况下，
.quote\u content
那么您必须使用子元素，我知道两种方法

一,-

二,-

或者，如果子元素具有类：

一,-

二,-

如果您只想在页面中查找任何包含classname quote_内容的元素并返回其HTML内容，请尝试以下操作：

$$('.quote_content').each(function(elm){
  // do whatever you like with elm.innerHTML
  alert( elm.innerHTML );
  // note that any whitespace, as in your example
  // will be preserved. You may prefer this instead:
  var child = elm.down();
  alert( child.outerHTML );
  // this only works if you know there is only one
  // child element, though
});

$('.quote_content').children("a")

$('.quote_content > .child_element_class')

$('.quote_content').children(".child_element_class")

function showCompare() { 
  var quote_content = document.getElementById('quote_content'); 
  console.log(quote_content); 
  win = new Window({className: "mac_os_x", title: "Sample", width:800, height:400, destroyOnClose: true,   recenterAuto:false});

  win.getContent().innerHTML = quote_content.innerHTML; 
  win.showCenter(); 
}

$$('.quote_content').each(function(elm){
  // do whatever you like with elm.innerHTML
  alert( elm.innerHTML );
  // note that any whitespace, as in your example
  // will be preserved. You may prefer this instead:
  var child = elm.down();
  alert( child.outerHTML );
  // this only works if you know there is only one
  // child element, though
});