如何防止单击()事件通过子div以jQuery方式传递给父div ?

Situation:

情境:

<div class="header">
    <div style="float: left;" class="headerTitle">+ OPEN</div>
    <div class="closeBtn" style="float: right;">- CLOSE</div>
 </div> 
<div class="touristenContent">.....</div>
<div class="header">
    <di