使用jquery在另一个元素的兄弟中找到一个元素

<div class="container">
    <input type="button" value="play" class="btnplay"></input>
    <audio class="song">
        <source src="<%# Eval("f_audio") %>" />
    </audio>
    <div class="progress-show">
        <span class=".currTime">dsgbadgnsetb</span>
        <input class="progress-slider mdl-slider mdl-js-slider" type="range" min="0" max="100" value="0" tabindex="0">
        <span class=".totalTime">sfhsg s</span>
        <input class="volume-slider mdl-slider mdl-js-slider" type="range" min="0" max="100" value="50" tabindex="0">
    </div>
</div>
<div class="container">
    <input type="button