最简单，最可靠的方法是使用waitForKeyElements（）实用程序。

这是一个使用jQuery并更改Amazon搜索结果的 完整脚本waitForKeyElements：

// ==UserScript==
// @name     _Amazon Search, alter results
// @include  http://www.amazon.com/s/*
// @require  http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
// @require  https://gist.github.com/raw/2625891/waitForKeyElements.js
// @grant    GM_addStyle
// ==/UserScript==
/*- The @grant directive is needed to work around a design change
    introduced in GM 1.0.   It restores the sandbox.
*/

function addCustomSearchResult (jNode) {
    //***** YOUR CODE HERE *****
    jNode.prepend (
        '<div id="result_000" class="fstRow">Buy my stuff, instead!</div>'
    );
}

waitForKeyElements ("#atfResults", addCustomSearchResult);