JavaScript 实现文本复制功能 [ 新手入门 ]

<div id="copypw"  class="hotelea hoteldc">
    <input id="copypassword" type="hidden" value="husu" />
    <a href="javascript:void (0)" onclick="copyPassword()">复制</a>
</div>';

function copyPassword() {
    var input = document.getElementById("copypassword");           
    input.setAttribute("type", "visible");
    input.select();
    document.execCommand("copy");
    input.setAttribute("type", "hidden")
    alert("复制成功");
}