您必须在文档中查找文本节点，我使用这样的递归函数：

You will have to look for the text nodes on your document, I use a recursive function like this:

function replaceText(oldText, newText, node){ 
  node = node || document.body; // base node 

  var childs = node.childNodes, i = 0;

  while(node = childs[i]){ 
    if (node.nodeType == 3){ // text node found, do the replacement
      if (node.textContent) {
        node.textContent = node.textContent.replace(oldText, newText);
      } else { // support to IE
        node.nodeValue = node.nodeValue.replace(oldText, newText);
      }
    } else { // not a text mode, look forward
      replaceText(oldText, newText, node); 
    } 
    i++; 
  } 
}

如果你这样做，你的标记和事件处理程序将保持不变。

If you do it in that way, your markup and event handlers will remain intact.

编辑：更改代码以支持IE，因为IE上的文本节点没有 textContent 属性，在IE中你应该使用 nodeValue 属性，它也没有实现节点界面。

Changed code to support IE, since the textnodes on IE don't have a textContent property, in IE you should use the nodeValue property and it also doesn't implements the Node interface.

检查示例这里。