进来看看解决办法

<div>

    <ul class="bns-list1">

     <li class="list-title1">aaaa：</li>

      <li>

        <input type="text" id="txt3" name="txt3" onfocus="showAndHide('List3','show');" readonly />

       <div class="Menu" id="List3">

          <ul>

            <li><input type="checkbox" value="三sdfd" /><span>三</span></li>

            <li><input type="checkbox" value="a" /><span>b1</span></li>

            <li><input type="checkbox" value="a" /><span>b1</span></li>

            <li><input type="checkbox" value="a" /><span>b</span></li>

            <li><input type="checkbox" value="a" /><span>b213</span></li>

            <li class="list-button"><input type="button" value="确定"  onclick="showAndHide('List3','hide');" /></li>

          </ul>

        </div>

      </li>

      <li class="list-title1">bbbb：</li>

       <li>

        <input type="text" id="txt2" name="txt2" onfocus="showAndHide('List2','show');" readonly />

        <div class="Menu" id="List2">

          <ul>

            <li><input type="checkbox" value="三erwt" /><span>三er店1</span></li>

            <li><input type="checkbox" value="a" /><span>a1</span></li>

            <li><input type="checkbox" value="a" /><span>a1</span></li>

            <li><input type="checkbox" value="a" /><span>a</span></li>